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What is the correct answer?
4
Two unbiased coins are tossed. What is probability of getting at most one tail ?
A.
1
2
B.
1
3
C.
3
2
D.
3
4
Correct Answer :
D.
3
4
Total 4 cases = [HH, TT, TH, HT]
Favourable cases = [HH, TH, HT]
Please note we need atmost one tail, not atleast one tail.
So probability =
3
4
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