Question 80

Rizwan has a box in which he kept red and blue marbles. The red marbles and blue marbles were in the ratio 5 : 4. After he lost 5 red marbles the ratio became 10 : 9. How many marbles does he have now?

Solution

Red marble/Blue marble=5/4 .

Let say ,he has 5k red marbles and 4k blue marbles .

So, Now ,

(5k-5)/4k=10/9 .

or, 45k-45=40k.

or, k=9 .

Now he has = (5k+4k-5)=(45+36-5)=76.

C is correct choice.

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