Hi, I'd appriciate help with this problem;(adsbygoogle = window.adsbygoogle || []).push({});

Person X and Y have equal number of kids. There are 3 movie tickets. The probability that 2 tickets go to kids of one and 1 ticket goes to the kids of other is 6/7. How many kids do X and Y have?

Thanx

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# Probability and two groups

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