In a class of 20 boys,the average age is decreased by 2 months when one boy aged 18 years is replaced by a new boy.The age of the new boy is ?->(Show Answer!)

1. In a class of 20 boys,the average age is decreased by 2 months when one boy aged 18 years is replaced by a new boy.The age of the new boy is

Write Comment

Comments

Tags

Show Similar Question And Answers

QA->In a class of 20 students the average age is 16 years.If the age of the class teacher is added to that of students,the average age of the class becomes 17 years.What is the age of the teacher?....

QA->Average age of 15persons is 24 years. Later a boy is included into this group then average becomes 23 years. The age of the boy will be:....

QA->There are 50 students in a class. In a class test 22 students get 25 marks each, 18 students get 30 marks each. Each of the remaining gets 16 marks. The average mark of the whole class is :....

QA->In a class of 60 students, 55% are boys. The number of girls in the class is :....

QA->Who became the first England cricketer to cross the 10,000-run mark in Test cricket, and the youngest overall, beating Sachin Tendulkar"s record set in 2005 by five months at the age of 31 years, five months?....

MCQ-> Read the following passage carefully and answer the questions. Certain words/phrases are given in bold to help you locate them while answering some of the questions. Until the 1960s boys spent longer and went further in school than girls, and were more likely to graduate from university. Now, across the rich world and in a growing number of , poor countries, the balance has tilted the other way. Policymakers once fretted about girls’ . lack of confidence in science but this is changing. Sweden has commissioned research into its “boy crisis”. Australia has devised a reading programme called “Boys, Blokes, Books and Bytes”. In just a couple of generations, one gender gap has closed, only for another to open up. The reversal is laid out in a report published on March 5th by the OECD. a Paris based Rich country thinktank. Boys’ dominance just about endures in maths: at age 15 they are, on average, the equivalent of three months’ schooling ahead of girls. In science the results are fairly even. But in reading, where girls have been ahead for some time, a gulf has appeared. In all G4 countries and economies in the study, girls outperform boys. The average gap is equivalent to an extra year of schooling. The OECD deems literacy to be the most important skill that it assesses, since further learning depends on it. Sure enough, teenage boys are 50% more likely than girls to fail to achieve basic proficiency in any of maths, reading and science. Youngsters in this group, with nothing to build on or shine at, are prone to drop out of school altogether. To see why boys and girls fare so differently in the classroom, first look at what they do outside it. The average 15year old girl devotes five and half hours a week to homework, an hour more than the average boy, who spend more time playing video games and trawling the internet. Three quarters of girls read for pleasure, compared with little more than half of boys. Reading rates are falling everywhere as screens draw eyes from pages, but boys are giving up faster. The OECD found that, among boys who do as much homework as the average girl, the gender gap in reading fell by nearly a quarter. Once in the classroom, boys long to be out of it: They are twice as likely as girls to report that school is a “waste of time”, and more often turn up late. Just as a teacher sused to struggle to persuade girls that science is not only for men, the OECD now urges parents and policymakers to steer boys away from a version of masculinity that ignores academic achievement. Boys’ disdain for school might have been less irrational when there were plenty of jobs for uneducated men. But those days have long gone. It may be that a bit of swagger helps in maths, where confidence plays a part in boys’ lead (though it sometimes extends to delusion:12% of boys told the OECD that they are familiar with the mathematical concept of “subjunctive sealing”, a red herring that fooled only 7% of girls.) But their lack of self Visit discipline drives teachers crazy. The OECD found that boys did much better in its anonymised tests than in teachers assessments. What is behind this discrimination? One possibility is that teachers mark up students who are polite, eager and stay out of flights, all attributes that are more common among girls. In some countries, academic points can even be docked for bad behaviour.Choose the word which is opposite in meaning to the word DOCKED given in bold as used in the passage.
....

MCQ->Two boys are playing on a ground. Both the boys are less than 10 years old. Age of the younger boy is equal to the cube root of the product of the age of the two boys. If we place the digit representing the age of the younger boy to the left of the digit representing the age of the elder boy, we get the age of father of the younger boy. Similarly, if we place the digit representing the age of the elder boy to the left of the digit representing the age of the younger boy and divide the figure by 2, we get the age of mother of the younger boy. The mother of the younger boy is younger to his father by 3 years. Then, what is the age of the younger boy?....

MCQ->In a class of 20 boys,the average age is decreased by 2 months when one boy aged 18 years is replaced by a new boy.The age of the new boy is....

MCQ->In a class there are 30 boys and their average age is 17 years. If one boy aged 18 years leaves and other joins the class, then average age becomes 16.9 years. The age of the new boy is....

MCQ-> Read the passage carefully and answer the questions that follow:In the Fifth grade, Benjamin Carson thought he was one of the dumbest kids in his class. His classmates thought he was one of the dumbest, his teacher thought he was one of the dumbest, and he thought he was one of the dumbest. Therefore, when he brought home a report that reflected poor progress, Benjamin was very philosophical about it. He told his mother, “Yah, you know it doesn’t matter very much”.His mother had a different opinion. Having only a third grade education, Mrs. Carson knew that her children’s only chance to escape poverty was through a good education. Her two boys were not reaching their potential at school, and she knew that if they were going to get a good education, it would have to start at home. She began with three rules. Rule number one, the boys would only be allowed to watch two pre-selected TV shows per week. Rule number two, the two boys would have to finish all their homework before they could watch TV or even play outside. Rule number three, the boys would have to read two books from the library each week and write a book report on each of them.Benjamin was dismayed at these new rules and tried very hard to talk his mother out of them. She stood firm, and not thinking to disobey his mother, he followed her rules. Before long he saw the fruits of his labor, when he was the only one who knew an answer to a question the teacher asked the class. Then there was a second question only he knew the answer to. His teacher and rest of his classmates were surprised that he knew the correct answer to such hard questions. He was even a little surprised himself, but he knew his knowledge came from the books he was reading. He began to surmise that if he could learn just a few facts from books at the library, he could learn anything.Benjamin continued on his road of growth and became an academic leader in his school. He had learned to love reading and realized that he could channel that love into learning. He did not let the labels and jeers of others, forever box him into an unproductive and unfulfilling future. Mrs. Carson did not settle for less then her boys were capable of being, she demanded that they take their education seriously and gave them a structured way they could do it. Today Benjamin Carson, the boy who thought he was the dumbest boy in his 5th grade class, is a world famous surgeon at the prestigious Johns Hopkins Hospital in Maryland.What was Benjamin’s first reaction to his mother’s rules?
....