Question

7. There are 33 teenagers in a class. Their favourite subjects are either computing, PE or both. Three of them like both subjects. There are twice as many teenagers who only like computing as teenagers who like PE only. How many of them like computing? (A) 15 (B) 18 (C) 20 (D) 22 (E) 23. Please Explain carefully or right down and solve and send pic​

Answer 1

Answer: C, 20

33 - 3 = 30
^the three who like both

x + 2x = 30
^students who only like computing
^students who only like PE

3x = 30

x = 10, so twice that is 20.

*hope i explained it well!!