Question

Ashlin has two boxes I and II. Box I contains 3 red and 6 black balls.Box II contains 5 red and ‘n’ black balls.One of the two boxes, box I and box II is selected by her friend Shirell at random, then Shirell draws a ball at random. The ball drawn is found to be red.
22. Ashlin notices the probability of the red ball taken out from the box II is 35 .Then Shirell asks her about the value of n.The value of n is
a) 1 b) 3 c) 5 d) 6
23. The probability that box I is selected given that the ball drawn is found to be red, is
a) 35 b) 25 c)15 d)1
24. What is the probability that the ball drawn is found to be red?
a) 5 b) 7 c) 5 d) 12 12 12 21 5

Answer 1

Answer:

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