Question

A school survey found that 7 out of 30 students walk to

school. If two students are selected at random without
replacement, what is the probability that both students
walk to school?
49/90

49/900

7/30

7/145

Answer 1

Answer: 7/145

Explanation:

The probability that the first student walks to school will be: = 7/30.

The probability of selecting the second student that walks to school will be: = 6/29.

Then we multiply both together and this will be:

= 7/30 × 6/29

= 7/145