Answer:
B
Step-by-step explanation:
The chances of the first student walking to school is 7/30.
Without replacement, there are 29 students left. Hence the chance of the second student walking to school is 6/29 of the original 7/30 chance.
[tex](\frac{7}{30} )(\frac{6}{29} )=\frac{7}{145}[/tex]
