Answer:
option a
option d
option e
Step-by-step explanation:
option a

option d

option e

22 students...16 boys
probability student will be a boy is 16/22 which reduces to 8/11 or 72.7%
Well since the first expression says 8x(40+7) the answer would be 40 that is missing
Since your splitting 47 into 40 and 7 and multiplying both of them by 8 the answer would be 40