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Three boys are ages 4, 6 and 7 respectively. Three girls are [#permalink]
09 Dec 2012, 09:05

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45% (medium)

Question Stats:

68% (03:07) correct
32% (01:55) wrong based on 95 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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