consider the experiment of tossing two fair coins simultaneously,find the probability that both are head given that at least one of them is a head

Asked by mayadesai | 7th Jan, 2014, 05:03: PM

Expert Answer:

 When two coins are tossed, the sample space is given by

 = {HH, HT, TH, TT}

Let A be the event the first coin results in a head

And B be the event that the second coin results in a head.

Then, P(A) = and P(B) =
Ths, required probability
=P(both are heads / atleast one is head)  .......[Conditional probability]

Answered by Rashmi Khot | 8th Jan, 2014, 11:22: AM

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