1. A system of ordinal numbers representing the classes in a scheme of library classification is known as:





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QA->A school has only three classes comprised of 40, 50 and 60 students respectively. In these classes, 10%, 20% and 10% students respectively passed in the examinations. What is the percentage of students passed in the examination from the entire school?....
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MCQ-> A school consisting of a total of 1560 students has boys and girls in the ratio of 7:5 respectively. All the students are enrolled in different types of hobby classes, viz: Singing, Dancing and Painting.One-fifth of the boys are enrolled in only Dancing classes.Twenty percent of the girls are enrolled in only Painting classes.Ten percent of the boys are enrolled in only Singing classes.Twenty four percent of the girls are enrolled in both Singing and Dancing classes together.The number of girls enrolled in only Singing classes is two hundred percent of the boys enrolled in the same.One-thirteenth of the boys are enrolled in all the three classes together.The respective ratio of boys enrolled in Dancing and Painting classes together to the girls enrolled in the same is 2 :1 respectively.Ten percent of the girls are enrolled in only Dancing classes whereas eight percent of the girls are enrolled in both Dancing and Painting classes together.The remaining girls are enrolled in all the three classes together.The number of boys enrolled in Singing and Dancing classes together is fifty percent of the number of girls enrolled in the same.The remaining boys are enrolled in only Painting classes.What is the total number of boys who are enrolled in Dancing ?
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MCQ->A system of ordinal numbers representing the classes in a scheme of library classification is known as:....
MCQ->Ram invested P in scheme A and 2P in scheme B, for two years each. Scheme A offers simple interest p.a. Scheme B offers compound interest (compounded annually) at the rate of 10% p.a. Respective ratio between the interest earned from scheme A and that earned from scheme B was 8 : 21. Quantity : I. Rate of interest offered by scheme A. II. Rate of interest offered by scheme C (simple interest p.a.), when 1,600/- is invested for 3 years earns an interest of 384/-.....
MCQ-> There were a hundred schools in a town. Of these, the number of schools having a play - ground was 30, and these schools had neither a library nor a laboratory. The number of schools having a laboratory alone was twice the number of those having a library only. The number of schools having a laboratory as well as a library was one-fourth the number of those having a laboratory alone. The number of schools having either a laboratory or a library or both was 35.How many schools had none of the three viz., laboratory, library or play - ground?
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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?....
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