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Sagot :
Probability of getting a head is 60%
More heads than tails means these possibilities are
2 Heads - 1 Tail
3 Heads - 0 Tails
Probability of 2 Heads and 1 Tail = C (3,2) (.60) ^2 (.40)
=3 * (.36) (.40)
=3 * .144
=3 (144/1000)
=3 (18/125)
=54/125
Probability of 3 Heads = (.60) ^3
= .6 (.36)
= .216 = 216 / 1000
= 27 / 125
Hence, total probability = 54 / 125 + 27 / 125
= 81 / 125
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