Given that n(m)=50,n(p)=25,and n(mup)=60,calculate n(pnm)

Answer 1

I will assume this deals with sets and you are saying:
n(m)=50,n(p)=25,and n(m ∪ p)=60,calculate n(p ∩ m)

n(p ∩ m) = n(m) + n(p) - n(m ∪ p)
= 50 + 25 - 60 = 15

sketch a Venn diagram to illustrate this result

Answer 2

50+25-60=15