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The students in three classes are in the...

The students in three classes are in the ratio 2:3:5. If 20 students are increased in each class, the ratio changes to 4:5:7. Originally the total number of students was :

A

100

B

180

C

200

D

400

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The correct Answer is:
C
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S CHAND IIT JEE FOUNDATION-RATIO AND PROPORTION-QUESTION BANK-15
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  3. A profit of Rs 6000 is be distributed among A, B and C in the ratio 3:...

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  4. Rs. 2010 are to be divided among A, B, C in such a way that if A ge...

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  5. Rs. 180 are to be divided among 66 men and women. The ratio of the ...

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  6. An amount of 53 is divided among A, B and C such that A gets Rs. 7 ...

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  7. 15 men, 18 women and 12 boys working together earned Rs. 2070: If t...

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  8. Krishnamurthy started business investing Rs 6000. Three months later M...

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  9. The incomes of A,B,C are in the ratio of 12:9:7 and their spendings ar...

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  10. The employer reduces the number of employees in the ratio 9: 8 and inc...

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  11. Ratio of the incomes of A, B and C last year as 3:4:5. The ratio of...

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  12. The ratio of the ages of a man and his wife is 4:3. After 4 years, ...

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  13. A barrel contains a mixture of seine and water in the ratio 3 : 1. ...

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  14. There are three containers of equal capacity. The ratio of Sulphuric a...

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  15. The students in three classes are in the ratio 2:3:5. If 20 students a...

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  16. Two identical vessels A and B contain mixtures of milk and water in...

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  17. A bottle is full of dettol. One-third of it is taken out and then an e...

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  18. In two alloys, copper and zinc are related in the ra tio of 4:1 and 1:...

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  19. Railway fares of 1st, 2nd and 3rd class between two stations were i...

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  20. Three containers A, B and C are having mixtures of milk and water i...

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