The probability that an individual has 20-20 vision is 0.160.16. in a class of 4040 students, what is the mean and standard deviation of the number with 20-20 vision in the class? round to the nearest thousandth.

The mean is 6.4 and the standard deviation is 2.319.

The mean of a binomial distribution is given by

μ = np = 40 (0.16) = 6.4

The standard deviation is given by

σ = √ (n) (p) (1-p) = √40 (0.16) (0.84) = √5.376 = 2.319