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CBSE Class 12-science Answered

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 | 07 Jan, 2014, 05:03: PM
answered-by-expert 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 | 08 Jan, 2014, 11:22: AM

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