Answer
• a) 3
,
• b) 21
,
• c) Not enough information
Step-by-step explanation
Given
• 28 seniors
,
• 24 students went to the trip, where 7/8 were seniors.
Procedure
• a)
We are given the proportion of seniors, if we want to know the proportion of juniors we have to subtract it from 8/8 (whole):
Next, we have to multiply the students that went times the proportion:
3 juniors went on the trip.
• b)
Now we have to multiply the proportion given times the students that went:
Thus, 21 seniors went on the trip.
• c)
As we are not given the juniors that are in the class, we cannot answer this one.