Question

Class 7th.
Subject Maths.
Chapter Sets.

Please explain step by step
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Answer 1

Answer:

Step-by-step explanation:

Given,

n(AuB) = 18, n(A) = 8, n(B) = 15

n(AuB) = n(A) + n(B) - n(AnB)

=> n(AnB) = n(A) + n(B) - n(AuB)

=> n(AnB) = 8 + 15 - 18

                 = 5.