A number is chosen from the first 24 positive integers. Find the probability that:

Question

a) the number is divisible by 3 given that it is divisible by 4
b) the number is divisible by 6 given that it is divisible by 3

Just need help with either one, thank you for your time.

Answer 1

Numbers 1 - 24 that are divisible by 4: 4, 8, 12, 16, 20, 24

Which of those are also divisible by 3?

Answer 2

12, 24

Answer 3

For future students who google this:
A) 2/6 or 1/3
B) 1/2

Answer 4

Q2. Numbers 1 - 24 that are divisible by 3: 3, 6, 9,12, 15,18, 21, 24
Which of those are also divisible by 6?
6, 12, 18, 24 So therefore 4/8 = 1/2 = Pr(d6Id3)