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The average age of 5 boys is 12 years. The average age of 3 others is 16 years. The average age of all the 8 boys is :
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13 1 years 2 - 14 years
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12 1 years 2 - 13 years
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Correct Option: A
Given , The average age of 5 boys = 12 years.
Sum of 5 boys = 12 × 5
The average age of 3 others boys = 16 years.
Sum of 3 others boys = 16 × 3
| Required average = | 5 × 12 + 3 × 16 |
| 5 + 3 |
| Required average = | 60 + 48 |
| 8 |
| Required average = | 108 |
| 8 |
| Required average = | 27 |
| 2 |
| Required average = 13 | 1 | years. |
| 2 |
