the failure rate in German class is 30%. In a class of 50 students find the prob

Question

the failure rate in German class is 30%. In a class of 50 students find the probability that exactly 5 students will fail. Use normal distribution to approximate the binomial distribution. Round the standard deviation to three places the failure rate in German class is 30%. In a class of 50 students find the probability that exactly 5 students will fail. Use normal distribution to approximate the binomial distribution. Round the standard deviation to three places the failure rate in German class is 30%. In a class of 50 students find the probability that exactly 5 students will fail. Use normal distribution to approximate the binomial distribution. Round the standard deviation to three places the failure rate in German class is 30%. In a class of 50 students find the probability that exactly 5 students will fail. Use normal distribution to approximate the binomial distribution. Round the standard deviation to three places

Explanation / Answer

Given here is the P(Failure),p = 0.3

Therefore P(Passing), q = 1-0.3 = 0.7

n= Total no of students = 50

To find the probability that exactly 5 students will fail in a class of 50 = nCr * pr * qn-r

= 50C5 * (0.3)5 * (0.7)(50-5) = (50!/45!5!) * (0.3)5 * (0.7)45 = 0.000551

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