Question

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

    A 5/128 Correct Answer Incorrect Answer
    B 15/128 Correct Answer Incorrect Answer
    C 13/128 Correct Answer Incorrect Answer
    D 17/128 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) = ((10 × 12 )/(3 × 2))/(32 × 32) = (10 × 12)/(32 × 32) = 15/128

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