- 04/28/2019 at 9:20 am #683038EduGorillaKeymasterSelect Question Language :
Direction: This paragraph is followed by a question which has four choices (1), (2), (3) and (4), out of which ONE or MORE THAN ONE are correct.
Let n1 and n2 be the number of red and black balls, respectively, in box I. Let n3 and n4 be the number of red and black balls, respectively, in box II.
One of the two boxes, box I and box II, was selected at random and a ball was drawn randomly out of this box. The ball was found to be red. If the probability that this red ball was drawn from box II is , then which of the following possible values of n1, n2, n3 and n4 is/are correct?
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- n1 = 3, n2 = 3, n3 = 5, n4 = 15
- n1 = 3, n2 = 6, n3 = 10, n4 = 50
- n1 = 8, n2 = 6, n3 = 5, n4 = 20
- n1 = 6, n2 = 12, n3 = 5, n4 = 20
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