There are two numbers such that the first number is twice the second number. If their average is 30, then what is the positive difference between the two numbers?
Answer & explanation
Correct answer: option 4
Let 2nd number = a
Then 1st number = 2a
Sum of two numbers = 2 × 30 = 60
ATQ,
a+2a = 60
3a = 60
a = 20
Difference b/w these two number is a = 20