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Question

a bag contain 14 balls of which x or white if 6 more white balls r added 2 dat bag da probability of drawing white ball is 1/2.Find da value of x??

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Solution

The total number of white balls after adding 6 white balls = x+6

The total number of balls after adding 6 white balls = 14+6=20

Probabillity of getting white ball after adding 6 white balls = x+6 /20

By data

x+6/20 = 1/2

2x + 12 = 20

2x = 8

x =4


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