The sum of the ages of 5 children born at the intervals of 3 years is 50 years. What is the age of the youngest child?
Solution
Correct Answer: Option A
Let x = the youngest child. Each of the other four children will then be x+3, x+6, x+9, x+12. We know that the sum of their ages is 50 so we can form an equation:
x+(x+3)+(x+6)+(x+9)+(x+12) = 50
5x+30 = 50
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