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QUESTION 14
The average age of three boys is 24 years. If their ages are in the ratio 2:5:5, the age of the youngest boy is
16 years
11 years
21 years
12 years
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lets consider the ratios 2x, 5x, 5x
we know average is total number of observations uopn the number of observations
therefore,
Average = total number of observations/no. of observations
24= 2x+5x+5x/3
72 = 12x
x = 6
therefore
2x = 2 x 6 = 12
Hence the youngest age boy is 12 years
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