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in a consumer -perference survey of an i...

in a consumer -perference survey of an item, fifteen were found to use Brand A, twenty were found to use Brand B, five were found to be in the habit of using both brands A and B. Find the number of consumers using at least one of the two brands of the item.

A

1) 30

B

2) 20

C

3) 15

D

4) 35

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The correct Answer is:
A
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