Question

5. A bag contains 4 white balls and some red balls.If the probability of drawing a White
ball from the bag is 2/5 , find the number
of red balls in the bag

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Answer 1

Answer:

Given white balls = 2/5

so white ball = 2/5= 4/ n+4

2 ( n + 4 ) = 5 × 4

2 n + 8 = 20

2 n = 20 - 8 = 12

n = 6

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