a. 0.421 875 c. 0.011 718 75 b. 0.046 875 d. 0.1875
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1 Answer

If the child who doesn’t have green eyes is the youngest, then the probability is 0.25³×0.75=3/256.  But that child isn’t necessarily the youngest, so we need to multiply this probability by 4=0.046875, answer b.

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