Exam Questions Paper - ECE Questions and Answers

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A fair coil is tossed 10 times. What is the probability that ONLY the first two tosses will yield heads?

Answer : Option C

Explanation :

Use n_cr, (p)^r (q)^n-r [for any two losses yield head].

But in present case it is required case it is only for first two tosses. Thus in this case 10 times.

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