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Question

Two coins are tossed once. Find the probability of getting:
i) 2 heads
ii) at least 1 tail
[3 MARKS]

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Solution

Sample space: 1 Mark
Each subpart: 1 Mark each

Sample sapce is {HH, HT, TH, TT}
P (E) =Number of favourable outcomesTotal number of possible outcomes
i) The number of favourable outcomes i.e. two heads = 1
P(2 heads) =14

ii) The number of favourable outcomes i.e. at least 1 tail = 3
P(at least 1 tail) =34

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