80% of students of a class took Statistics and 45% took Mathematics. If each student took Statistics or Mathematics and 40 took both, t

Question

80% of students of a class took Statistics and 45% took Mathematics. If each student took
Statistics or Mathematics and 40 took both, the total number of students in the class was:​

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Brielle 2 days 2021-10-12T09:45:22+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-10-12T09:47:07+00:00

    Answer:

    85 students in total in class

    0
    2021-10-12T09:47:20+00:00

    Step-by-step explanation:

    Simple,

    Use n(A U B) = n(A) + n(B) – n(A !””! B)

    so, 100% = 80% + 45% -40 = 125% -40

    25% =40, 100% =160 Ans.

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