-3
$\begingroup$

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?

$\endgroup$

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

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where you have difficulties and helps them write answers appropriate to your experience level." – Leucippus, Shailesh, Claude Leibovici, Henrik
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Welcome to MathSE. When you pose a question here, it is expected that you share your own thoughts on the problem. You should explain what you have tried and where you are stuck so that you receive responses appropriate to your skill level. $\endgroup$ – N. F. Taussig Jul 27 '17 at 8:14
2
$\begingroup$

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

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

You've worked out the probability that only Tom is late, can you finish it off?

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.