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In a box, the ratio of red marbles to bl...

In a box, the ratio of red marbles to blue marbles is 7:4. Which of the following could be the total number of marbles in the box?

A

18

B

19

C

21

D

22

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NCERT EXEMPLAR-RATIO AND PROPORTION- Exercise
  1. Neelam’s annual income is Rs. 288000. Her annual savings amount to Rs....

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  2. Mathematics textbook for Class VI has 320 pages. The chapter 'symmetry...

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  3. In a box, the ratio of red marbles to blue marbles is 7:4. Which of th...

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  4. On a shelf, books with green cover and that with brown cover are in th...

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  5. The greatest ratio among the ratios 2 : 3, 5 : 8, 75: 121 and 40 : 25...

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  6. There are ‘b’ boys and ‘g’ girls in a class. The ratio of the number o...

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  7. If a bus travels 160 km in 4 hours and a train travels 320km in 5 hour...

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  8. (3)/(5) = (square)/(20)

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  9. (square)/(18) = (2)/(9)

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  10. (8)/(square)= (3.2)/(square)

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  11. (square)/(45) = (16)/(40) = (24)/(square)

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  12. Find the missing number (16)/(36)=(square)/(63)

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  13. The marked price of a table is Rs 625 and its sale price is Rs 500. Wh...

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  14. Which pair of ratios are equal? And why? (2)/(3), (4)/(6)

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  15. Which pair of ratios are equal? And why? (8)/(4),(2)/(1)

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  16. Which pair of ratios are equal? And why? (4)/(5), (12)/(20)

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  17. Which ratio is larger 10 : 21 or 21 : 93?

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  18. Reshma prepared 18kg of Burfi by mixing Khoya with sugar in the ratio ...

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  19. A line segment 56cm long is to be divided into two parts in the ratio ...

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  20. The number of milk teeth in human beings is 20 and the number of perma...

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