1. In a class 45 students boys and girls are in the ratio of 5 : 4 respectively. Average marks obtained by boys in Mathematics out of 100 were 76 and that of girls were 78. What are average marks of boys and girls together in Mathematics (rounded-off to two decimal points) ?
Write Comment
Comments
By: anil on 05 May 2019 01.33 am
The number of boys in the class is $$frac{5}{5+4}*45 = 25$$
The number of girls in the class is $$frac{4}{5+4}*45=20$$ Average marks obtained by boys is 76 and that of girls is 78.
Hence, the total marks obtained by the students is 76*25+78*20 = 3460 Therefore, the average marks obtained by the students together is 3460/45 = 76.89
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use
The number of girls in the class is $$frac{4}{5+4}*45=20$$ Average marks obtained by boys is 76 and that of girls is 78.
Hence, the total marks obtained by the students is 76*25+78*20 = 3460 Therefore, the average marks obtained by the students together is 3460/45 = 76.89