In earlier days, there was a chance to make a telephone call would be of 0.6. Determine the probability when it could make 11 successes in 20 attempts of phone call.(a) 0.2783(b) 0.2013(c) 0.1597(d) 3.8561I had been asked this question during an interview.Question is taken from Counting in division Counting of Discrete Mathematics

In earlier days, there was a chance to make a telephone call would be

1.	In earlier days, there was a chance to make a telephone call would be of 0.6. Determine the probability when it could make 11 successes in 20 attempts of phone call.(a) 0.2783(b) 0.2013(c) 0.1597(d) 3.8561I had been asked this question during an interview.Question is taken from Counting in division Counting of Discrete Mathematics
Answer» Right choice is (c) 0.1597 The best I can EXPLAIN: Probability of success p=0.6 and q=0.4. X=success in making a telephone CALL. HENCE, the probability of 11 successes in 20 attempts = P(X=11) = ^20C11(0.6)^11(0.4)^20 – 11 = 0.1597.

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