The ratio of three numbers is 6 : 5 : 9. If 20 percent of the first number is 30, then what would be 50 percent of the difference of third and second number?
Answer & explanation
Correct answer: option 1
Ratio = 6 : 5 : 9
Given that 20% of the first number (i.e. 6r) = 30
⇒ $\frac{1}{5}$ x 6r = 30
⇒ 1r = 25
Difference between third and second number = 4r = 4 × 25 = 100
50% of this number = 50