Question

can u answer the question pls​

Answer 1

Answer:

i. 26 ii. 16 iii. 22

Step-by-step explanation:

i) We know that,

n(A∪B) = n (A) + n (B) - n(A∩B)

Or, 42 = 20 + n(B) - 4

or, 42 - 20 + 4 = n(B)

or, n(B ) = 26

ii) We know that,

n(A-B) = n(A U B) - n(B)

or, n (A- B ) = 42 - 26

or, n (A-B) = 16

iii) We know that,

n(B - A) = n(A U B) - n(A)

or, n( B- A ) = 42 - 20

or, n ( B - A) = 22

Answer 2

Answer:

your answer is in the above picture..

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