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प्रश्न
Two coins are tossed simultaneously. Find the probability of getting at least one head.
उत्तर
s = {HH, HT, TH, TT}
n (s) = 4
A = {HH, HT, TH}
n(A) = 3
`p(A)=(n(A))/(n(S)) = 3/4`
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