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A box has 100 blue balls, 50 red balls a...

A box has 100 blue balls, 50 red balls and 50 black balls. 25% of blue balls and 50% of red balls are taken away. Then, percentage of black balls at present is

A

`25%`

B

`33(1)/(3)%`

C

`40%`

D

`60%`

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The correct Answer is:
B
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