I would recommend asking a tutor
Answer:

Step-by-step explanation:
Given
See attachment
Required
The probability that a 7th grader selected will play guitar.
From the attachment, we have:


7th graders that can play guitars are:

So, the probability is:


Through my understanding of the question I think the correct answers would be A and D.
hope this helps
Answer:
Step-by-step explanation:
dtuyhgtrfedfgrthyuj
Unit rate = price/quantity
= 40/16
=2.5 per pair (2.5/1)