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If a coin is tossed five times then what is the probability that you observe at least one head?

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If a coin is tossed five times then what is the probability that you observe at least one head? 

(a) 1/32 

(b) 15/32 

(c) 23/32 

(d) 31/32

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1 Answer

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Best answer

Correct option d (31/32)

Explanation:

Consider solving this using complement. 

Probability of getting no head = P(all tails) = 1/32 

P(at least one head) = 1 – P(all tails) = 1 – 1/32 = 31/32.

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