What is the probability of getting 3 heads when 3 unbiased coins are tossed simultaneously?
A
25
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B
15
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C
18
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D
38
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Solution
The correct option is C18 When 3 unbiased coins are tossed simultaneously, the outcomes are{HHH, HHT, HTH, THH, TTH, THT, HTT, TTT} Total number of outcomes = 8 Number of outcomes that favours all 3 heads = {HHH}=1 ∴probability=18