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Comparing Quantities Question .- 90% of …

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Comparing Quantities Question .- 90% of all students passed in Hindi,85% in Maths and 150 students passed in both.Find the total number of students in the school.

    • Posted by Himanshi Agarwal 5 years ago

    CBSE > Class 07 > Mathematics
    • 2 answers

    Prathmesh Hade 5 years ago

    Let the total no.of students in the school Number of students who passed Handi =90% of x Number of students who passed maths =85% of x And the number of students who passed handi and maths =150 N(A or B) =N(A)+N(B)- N (A and B) let the number of students be x 100%×=90%×+85%×-150 ×=9×+.85×-150 -.75×=-150 ×=200

    0Thank You

    Yogita Ingle 5 years ago

    Let the total no. of students in the school= x

    Number of students who passed Hindi= 90% of x

    Number of students who passed Maths= 85% of x

    and Number of students who passed both Hindi & Maths=150

    N( A or B) = N(A) + N(B) - N(A and B)

    let the number of students be x

    100% x = 90%x + 85% x - 150
    x = .9x + .85x - 150
    - .75x = -150
    x = 200

    There are 200 students in the school

    0Thank You

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