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The average age of boys in the class is twice the number of girls in the class. The ratio of boys and girls in the class of 50 is 4 : 1. The total of the ages (in years) of the boys in the class is
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- 2000
- 2500
- 800
- 400
Correct Option: C
| Boys in class = | × 50 = 40 | |
| 5 |
| Girls = | × 50 = 10 | |
| 5 |
Average age of boys = 10 × 2
= 20 years
∴ Total age of boys = 20 × 40
= 800 years
