Question

In a class of 7, there are 3 students who have done their homework. If the teacher chooses 3 students, what is the probability that none of the three students have done their homework?

Answer 1

The probability of the first one didn't do homework s 4/7,
the second is 3/6,
the third is 2/5,

Multiple all of them together
4/7*3/6*2/5=0.1143 or 11.43%

Answer:
0.1143 or 11.43%