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Question

If three coins are tossed, represent the sample space and the event of getting at least two heads also find the number of elements in them.

A
n(S)=8 and n(E)=4
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B
n(S)=8 and n(E)=1
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C
n(S)=8 and n(E)=7
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D
n(S)=8 and n(E)=3
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Solution

The correct option is A n(S)=8 and n(E)=4
If 3 coins are tossed,then the possible sample space can be : (HHH),(HHT),(HTH),(THH),(TTH),(THT),(HTT),(TTT)
where H=heads,T=tails
Hence,n(S)=8 and n(E)=4.

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