ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    The ratio of number of girls to number of boys is 3: 2

    in a class of 70 students. The average marks scored by the boys in Physics is 72 and the average marks scored by the whole class in Physics is 80. What is the average mark in Physics scored by girls? type-ssc
    A 84 Correct Answer Incorrect Answer
    B 74 Correct Answer Incorrect Answer
    C 85.3 Correct Answer Incorrect Answer
    D 68.3 Correct Answer Incorrect Answer

    Solution

    Total student =70 Ratio of the girls and boys=3:2 Girls =3/5) ├Ч70=42 Boys =28. Average marks in physics 28 boys =72 Total marks in physics of 28 boys =72├Ч28=2016 average marks scored by the whole class in Physics = 80 Total marks scored by whole class =80├Ч70=5600 Total marks scored by girls =5600-2016=3584 Average marks in physics of 42 girls=3584/42=85.3

    Practice Next
    More Average Questions

    Relevant for Exams:

    ask-question