CUET Preparation Today
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? |
25 15 10 20 |
20 |
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 |
