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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 40 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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  2. A pot contains 81 litres of pure milk. 1/3 of the milk is replaced by ...

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  3. A mixture contains milk and water in the ratio 5:1. On adding 5 litres...

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  4. If 2 kg of metal of which 1/3 is zinc and rest copper be mixed with 3 ...

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  5. The number of employees in companies A, B and C are in the ratio 3:2: ...

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  6. The ratio of a 2-digit number to the sum of its digits is 7: 1. If the...

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  7. The ratio of number of boys to that of girls in a group becomes 2 :...

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  8. A grocer buys kinds of rice X and Y, one (X) at the rate of a per kg a...

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  9. The ratio of the first and second class train fares be tween two stati...

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  10. Two liquids A and B are in the ratio 5:1 in container 1 and 1:3 in con...

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  11. If a : b = 3 : 4 and b : c = 8 : 9, then a : c = ?

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  12. If (1)/(x) : (1)/(y) : (1)/(z) = 2 : 3 : 5 then determine x : y :z

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  13. Two numbers are in the ratio 1 1/2:2 2/3dot When each of these i...

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  14. The total value of a collection of coins of denominations Re 1, 50-...

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  15. A flagstaff 17.5 m high casts a shadow of length 40.25 m. 1 he heig...

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  16. If x : y = 3: 4 , then (2x+ 3y) : (3y- 2x)= ?

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  17. By mistake ,instead of dividing Rs.117 among A,B and C in the ratio (1...

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  18. The students in three classes are in the ratio 2:3:5. If 40 students a...

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  19. If x : y = 7 : 3, then the value of (xy+y^(2))/(x^(2) - y^(2)) is:

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  20. rupes 750 is divided among A , B and C in such a manner that A : B = 5...

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