In a class 27 of students, 10 play an instrument and 11 play a sport. There are 13 students who do not play an instrument or a sport. What is the probability that a student does not play an instrument given that they play a sport?

4

Step-by-step explanation:

Total students = 27

A = students playing instrument

n(A) = 10

B = students playing sport

n(B) = 11

(A∪B)' = students who do not play an instrument or a sport

n(A∪B)' = 13

n(A∪B) = 27 - 13 = 14

n(A∩B) = n(A) + n(B) - n(A∪B)

            = 10 + 11 - 14 = 21 - 14

            = 7

No. of students playing only instrument = 10 - 7 = 3

No. of students  does not play an instrument given that they play a sport  = 11 - 7 = 4

P(No. of students  does not play an instrument given that they play a sport ) = 4/27

x=4

Step-by-step explanation:

20/25 = x/5

5x5=25

similarly 5x(4) is 20 thats why 20/25 = 4/5