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Subject :IMO    Class : Class 6

There are 222 red balls in a basket. A boy takes out 6 red balls from it and replaces them by 12 white balls. He continues to do so, till all red balls are replaced by white balls. Then the number of white balls put in the basket is ______.

A 333
B 444
C 345
D 400

Please explain

Ans 1:

Class : Class 4

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