Question
The ratio of the ages of A and B is 3:5. If the
difference between their ages is 10 years, what is the sum of their ages?Solution
Let the ages of A and B be 3x and 5x respectively. The difference is – 5x−3x=10  2x = 10 X=5 So, their ages are 15 and 25. And Sum =15+25=40years.
The mean proportion of 324 and 225 is:
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