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### Primary 4 Problem Sums/Word Problems - Try FREE

- Train yourself in basic math strategies > Exercise 7 > 1
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**Question
1 of 4**

A music store had four times as many audio CD's as video CD's.

It then added another 50 video CD's to its existing stock.

Now, the number of video CD's became `3/4`of the number of audio CD's.

(a) How many video CD's did the store have in the end?

(b) How many CD's did the store have initially?

*Notes to students:*

*If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12*

The correct answer is :

**75,125**