# Calculate the probability that on any randomly chosen day, Jerry is late for work. [closed]

On any randomly chosen day, the probability that Tom is late for work is 0.15 while the probability that both Tom and Jerry are late for work is 0.05. the probability that at least one of them is late for work is 0.30.

Calculate the probability that on any randomly chosen day, Jerry is late for work.

I have calculated the probability that Tom is late, which was 0.10. I'm not sure how to figure out the probability that Jerry is late?

## closed as off-topic by Leucippus, Shailesh, user8795, Claude Leibovici, HenrikAug 6 '17 at 7:23

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$P(\mathrm{Tom\,and/or\,Jerry\,late})=P(\mathrm{only\,Tom\,late})+P(\mathrm{only\,Jerry\,late})+P(\mathrm{Tom\,and\,Jerry\,late})$
$P(\mathrm{Jerry\,late})=P(\mathrm{only\,Jerry\,late})+P(\mathrm{Tom\,and\,Jerry\,late})$