What is the probability that one of the two integers randomly selected from range 20-29 is prime and the other is a multiple of 3?
(The numbers are selected independently of each other, i.e. they can be equal)
There are two primes within the 20-29 range = 23 and 29. So P=2/10
There are three numbers that are multiple of 3: 21, 24 and 27. So P=3/10
So to have one AND the other (2/10)*(3/10) = 3/50
What is the OA ?