Question

There are 12 black balls and some green balls in a bag. Find the total number of balls in the bag if the probability of drawing a green ball is two-thirds of the probability of drawing a black ball.

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Answer 1

Answer:

2/3=12/x

2x=3x12

x=3x6

total number of ball is 18

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Numbers. of green ball=12

Number. Of Black ball=x

Total possible outcome =12+x

No. Of favourable outcome = x

A/q if new probability is 2/3 of probability of before then,

2/3=x/12+x

Or, 3x=24+2x

Or, x=24 ..✓