Elena’s bus runs every 20 minutes. If she arrives at her bus stop at a random time, what is the probability that she will have to wait at least 5 minutes for the bus if it is running on schedule?
a)50%
b)75%
c)5%
d)20%

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a

the 20 minutes is 100% and the 5 minutes is what %?

then take the new % u got, and subtract from 100%
that is your answer.

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