Jack S.

# Probability question

The probability of a certain runner finishing in the top 5 of a race is 20%. The probability of him finishing in the top 10 is 45%.

What is the probability of him finishing anywhere from 6-10th. Is it: 45%-20% = 25%?

If there is not enough information to answer this question then what other info would we need?

Deontae H.

tutor
Yes you are correct! I say this because the probability that you finish in the top 10 includes the event in which you possibly finish top 5. But we don't want the probability that you finish in the top 5, so you get rid of it.
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10/28/20