Question

If A u B, then A n B = __________

Answer 1

Answer:

GIVEN ;

n (U) = 700

n (A) = 200

n(B) = 300

n (A ∩ B) = 100

n (A' ∩ B') = n (A U B)'

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

n (A U B) = 200 + 300 - 100

n (A U B) = 500 - 100

n (A U B) = 400

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

n (A U B)' = 700 - 400

n (A U B)' = 300

n (A' ∩ B') = n (A U B)'

n (A' ∩ B') = 300

Hence, n (A' ∩ B') = 300