HELP ASAP For which of the binomial distributions listed below is the normal distribution not a reasonable approximation?

Question

For which of the binomial distributions listed below is the normal distribution not a reasonable approximation?

1.N=40, P=0.8

2.N=50, P=0.4

3.N=75, P=0.11

4.N=40, P=0.88

Answer 1

Typically, the rule of thumb is np≥5. Therefore, your answer is D.