Question

if n(A) =300 ,n(A∪B)=500,n(A∩B)=50 and n(B')=350,find n(B) and n(U)​

Answer 1

Answer:

Here,

Step-by-step explanation:

Given,

n(A)=300

n(AUB)=500

n(AñB

Answer 2

Answer:

n(B) = 250,

n(U) = 600

Step-by-step explanation:

n(A∪B) = n(A) + n(B) - n(A∩B)

500 = 300 + n(B) - 50

500 - 250 = n(B)

n(B) = 250

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

350 = n(U) - 250

n(U) = 350 + 250

n(U) = 600