Question

0. A bag contains 12 balls which are numbered from 1 to 12. If a ball is selected at random
what is the probability that the number of the ball will be a multiple of 5 or 6?
(a) 0.30
(b) 0.25.
(c) 0.20
d) 1/3
1. Given that for two events A and B, P (A) = 3/5, P (B) = 2/3 and P (AUB) = 3/4, what
/R)2​

Answer 1

Explanation:

0)multiple of 5=2thenp(5)=2/12

multiple of 6=2thenp(6)=2/12

common multiple of both 5and6=0

then,

multiple of 5or6=p(p5Up6)=p(5)+p(6)-0

=2/12+2/12=1/3