Answer:
The least amount of prizes Mrs Drennan needs to buy = 6
Step-by-step explanation:
She likes to keep at least three times as many prizes in the bag as she has students.
If number of students is n, number of prizes she has = 3 n
Given that Mrs. drennan has 26 students
That is n = 26
Number of prizes needed = 3n = 3 x 26 = 78
Number of prizes she has = 72
Minimum prizes she need to buy = 78 - 72 = 6
The least amount of prizes Mrs Drennan needs to buy = 6
