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Three boys are ages 4, 6 and 7 respectively. Three girls are [#permalink]
09 Dec 2012, 09:05
This post was BOOKMARKED
69% (02:57) correct
31% (01:40) wrong based on 61 sessions
Three boys are ages 4, 6 and 7 respectively. Three girls are ages 5, 8 and 9, respectively. If two of the boys and two of the girls are randomly selected and the sum of the selected children's ages is z, what is the difference between the probability that z is even and the probability that z is odd?
Re: Three boys are ages 4, 6 and 7 respectively. Three girls are [#permalink]
09 Jul 2014, 06:00
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