I would really appreciate it if someone could help me with this, I will give 5 stars. Thank you so much I really appreciate it.

Answer:
Step-by-step explanation:
a:
21 49 70
46 34 80
67 83 150
b: 34+49=83
c:
total no. of students = 150
no of boys who disapproved = 46
probability = 150/46 = 75/23
hope that helps!