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Question

If a coin is tossed 10 times then what is the probability of getting three heads?

A 19/109 Correct Answer Incorrect Answer
B 22/109 Correct Answer Incorrect Answer
C 13/118 Correct Answer Incorrect Answer
D 15/128 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

Total sample spaces = 2¹⁰ Total favourable events N(P) = ¹⁰C₃ Probability (E) = (N(P))/(N(S)) = (¹⁰C₃ )/(2¹⁰)= (¹⁰C₃ )/(2^5. 2⁵) = 120/(32 × 32) = 15/128

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