Question

A bag contains 40 balls out of which x are white. If one ball is drawn at random, the
probability of drawing a white ball is y. Now place this ball and 20 more white balls in this
bag . Now, if a ball is drawn from the bag, the probability of drawing the white ball is 4y.
Find x

(6x4)​

Answer 1

Answer:

Xby 40 = y

X+20 by 60 = 4y

X = 40y

Putting the value of x in another equation

40y +20 by 60 = 4y

40y + 20 = 240y

20 = 240y - 40y

20 = 200 y

Y = 20by 200

Y = 0.1

Putting the value of y in another equation

X= 40 into 0.1 = 4

X = 4

Explanation:

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