Question 63
The ratio of two numbers is 3 : 7. The sum of the two numbers is 180. What is the positive difference between the two numbers?
Solution
The ratio of two numbers is 3 : 7.
Let's assume the two numbers are 3y and 7y.
The sum of the two numbers is 180.
3y+7y = 180
10y = 180
y = 18
Positive difference between the two numbers = 7y-3y
= 4y
= $$4\times18$$
= 72
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