In a class of 30 students, 21 play an instrument and 8 play a sport. There are 7 students who do not play an instrument or a sport. What is the probability that a
student does not play a sport given that they play an instrument?

Step-by-step explanation:

The formula for probability is favourable outcome/ Total outcome. So the answer might be 7/30.

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

a. is correct