Assume that each born child is equally likely | vedclass

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Question

$P(B o y)=P(g i r l)=\frac{1}{2}$

Required probability $=\frac{	ext { all four girls }}{	ext { Atleast two girls }}$

$=\frac{\left(\frac{1}{2}

Vedclass · Accepted Answer

$\frac{1}{11}$

Vedclass · Answer

$P(B o y)=P(g i r l)=\frac{1}{2}$

Required probability $=\frac{	ext { all four girls }}{	ext { Atleast two girls }}$

$=\frac{\left(\frac{1}{2}ight)^{4}}{\left(\frac{1}{2}ight)^{4}+^{4} \mathrm{C}_{3}\left(\frac{1}{2}ight)^{4}+^{4} \mathrm{C}_{2}\left(\frac{1}{2}ight)^{4}}$

$=\frac{1}{11}$

Assume that each born child is equally likely to be a boy or a girl. If two families have two children each, then the conditional probability that all children are girls given that at least two are girls is

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