The mean age of three students is 28 years. If the ratio of their ages is 2 : 3 :2 , find their ages.
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let their ages be 2x, 3x, 2x
therefore sum of their ages = 2x + 3x + 2x = 7x = 28 * 3 = 84
7x = 84
x = 12
therefore 2x = 24, 3x = 36
therefore the ages are 24 yrs, 36 yrs, 24 yrs
therefore sum of their ages = 2x + 3x + 2x = 7x = 28 * 3 = 84
7x = 84
x = 12
therefore 2x = 24, 3x = 36
therefore the ages are 24 yrs, 36 yrs, 24 yrs
rohanharolikar:
average = sum of 3 ages divided by 3
so the sum must be average × 3
28 × 3 is 84
it will sum out to give 24 +36+24=84
Oh, ok got it
great
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ok bro..
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