Answer:
Yes, it is an adequate model.
Step-by-step explanation:
In binomial distribution, the mean is expressed as;
μ = np
Now, for us to know whether to use normal distribution model, the condition is that;
np ≥ 5
Now, np < 5 for any reason, it means the normal distribution is not suitable.
Now, we are told that the mean is 40. This is more than the minimum of 5 and so the normal distribution is an adequate model for this distribution.
