Question

Can anyone help? An urn contains 25 balls numbered 0 through 24. A single ball is taken from the urn. Whats the probability as a decimal fraction for a) the number 4 b) A prime number

Answer 1

There are 25 balls, each with the same chance of being randomly selected which is 1/25. Can you see what the probability of selecting a ball with the number 4 must be?
Remember to express the probability as a decimal fraction.

Answer 2

Can you see what to do?

Answer 3

The probability of drawing any single number is 1/25. So the probability of drawing a ball with the number 4 on it will be 1/25. All you need to do is to express 1/25 as a decimal fraction to get the answer:
\[\frac{1}{25}=0.??\]

Answer 4

ok, I see. ty

Answer 5

You're welcome :)