Question

1 class p has 30 students of which 20 like music. In class q, 10 students like music. Find the number of students in class q if the average number of students who like music in a class is 16. A 15 b 20 c 25 d 10

Answer 1

Answer:

no one remain in the class

Answer 2

Answer:

There are 20 students in class q.

Step-by-step explanation:

Step 1:

Since we have given that  

Step 2:

Number of students in class p = 30

Number of students in class p like music = 20

Number of students in class q who like music = 10

Number of students in class q be 'x'.

Average number of students who like music in a class = 16

Step 3

According to question, we have that  

(20 × 30+ 10  × x)/(30 + x)  = 16

(600+ 10 x)/(30 + x)   = 16

600 + 10 x = 16 (30 + x)

600 + 10x =480 + 16x

600 – 480 =16x – 10x

120x =6x

X=120/6 = 20