[" 11.(a) A family has "2" children.Find...

[" 11.(a) A family has "2" children.Find the probability "],[" that both are boys,if it is known that: "],[" (i) at least one of the children is a boy "],[" (N.C.E.R.T.; Jharkhand B.2016; A.I.C.B.S.E.2010) "]

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