Four numbers are in the ratio 1:2:3:4. Their sum is 16. Calculate the sum of the first and fourth numbers.
Show answer & explanation
Correct answer: D
Explanation
Given:
Ratio = 1 : 2 : 3 : 4, Total Sum = 16
According to the formula:
Actual Value = (Ratio / Total Parts) × Total Sum
Total Parts = 1 + 2 + 3 + 4 = 10
Value = 16/10 = 1.6
First Number = 1 × 1.6 = 1.6
Fourth Number = 4 × 1.6 = 6.4
Sum = 1.6 + 6.4 = 8