Suppose that 100 students each draw a sample from a normal distribution

with unknown population mean μ and and population variance σ2. Each student then

uses Student’s 1-sample t-test to test H0 : μ = 0 versus H0 : μ 6= 0 at significance level

α = 0.05. Unbeknownst to the students, the null hypothesis is correct, i.e., it actually

is the case that μ = 0. What is the probability that at least two students will commit

Type I errors?

(please help me how to solve this question~ thank you~)