Question

explain in detail each steps​

Answer 1

Answer:

10 play both cricket and Tennis

Answer 2

Answer:

Let

No of student play cricket( C) = 30

No of student play tennis (T) = 20

Total no student ( C u T ) = 35

We know formula

n(A u B) = n(A) + n(B) - n ( A n B)

35 = 30 + 20 - n( C n T )

35 - 50 = - n( C n T)

-15 = - n( C n T)

C n T = 15

No of student play both game ( Cricket & Tennis ) = 15

Hence options C is correct