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The average age of students of aclass is...

The average age of students of aclass is 15.8yr. The average age of boys in the class is 16.4yr and that of the girls is 15.4 yr. Find out the ratio of the number of boys to the number of girls in the class

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The correct Answer is:
`2:3`
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MAHENDRA-MIXTURE AND ALLIGATION-EXERCISE
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  6. How many kilograms of sugar costing Rs. 9 per kg must be mixed with 2...

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  7. In what ratio must water be mixed with milk to gain 16(2)/(3)% on sell...

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  9. Two vessels A and B contain milk and water mixed in the ratio 8: 5 and...

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  10. A milk vendor has 2 cans of milk. The first contains 25% water and the...

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  11. One quality of wheat at Rs. 9.30 per kg is mixed with another quality ...

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  12. Tea worth Rs 126 per kg and Rs 135 per kg are mixed with a third varie...

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  16. A vessel is filled with liquid, 3 parts of which are water and 5 parts...

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  18. A marchant has 50 kg. of sugar, part of which he sells at 8% profit an...

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  19. A mixture of 20 kg. of spirit and water contains 10% water. How much w...

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