The Total Moves Too

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ProbabilityVideo challenge · PROB02

The Total Moves Too

CBSE Class 10 · Solve it one decision at a time. A wrong pick earns a nudge, never the answer.

Step 1 of 7

The problem

A bag has only red, blue and green balls. The probability of drawing a red ball is 14\dfrac{1}{4} and of drawing a blue ball is 13\dfrac{1}{3}. When 66 more red balls are added to the bag, the probability of drawing a red ball becomes 13\dfrac{1}{3}. How many green balls are in the bag?

Step 1 · Your move

Before the guided steps, how many green balls did you get?

P(red)=14,P(blue)=13P(\text{red}) = \dfrac{1}{4},\quad P(\text{blue}) = \dfrac{1}{3}
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