Question

Please help
I need it quickly for homework.

Answer 1

The answers are as follows:
P(C U D) = (10+10+2+6+2+9)/80 = 39/80

P(C n B) U D = (10+2)/80 + (2+6+9)/80 = 29/80

P(B|C) = P(B n C)/P(C)
P(B|C) = ((10+2)/80)/((10+10+2+6)/80) = 12/28 = 3/7