Question

n(a)=3o ,n(anb)=12 ,n(aub)=50find n(b)​

Answer 1

Answer:

n(aub)=n(a)+n(b)-n(anb)

50=30+n(b)-12

50+12=30+n(b)

62=30+n(b)

62-30=n(b)

n(b)=32

Answer 2

Answer:

the ans is option b) 20

Step-by-step explanation: