Question

There are 315black balls in a basket. A boy takes out 5 black balls from the basket and replace them by white 8white balls.He continues to do so till all tje black ballsare replaced by white balls.Find the no. Of white balla in the basket, so obtaines

Answer 1

315/5=63 63×8=504 so answer is 504

Answer 2

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TOTAL NO OF BLACK BALLS = 315

NO OF TIMES THAT THE BOY TAKES OUT YHE BLACK BALL = 315 ÷ 5 = 63

NOW,

HE TAKES OUT 5 BLACK BALLS AND ADD 8 WHITE BALLS IT MEANS THAT IN EACH REPLACEMENT THERE ARE 3 MORE BALLS ADDED.

NOW,

NO OF EXTRA WHITE BALLS = 3 × 63 = 189

TOTAL NO OF BALLS IN THE BASKET = 189 + 315 = 504 BALLS

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