Gate Exam Numerical Ability Probability

Q. A and B are friends. They decide to meet between 1 PM and 2 PM on a given day. There is a condition that whoever arrives first will not wait for the other for more than 15 minutes. The probability that they will meet on that day is
(A) 1/4
(B) 1/16
(C) 7/16
(D) 9/16

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Gate Other Question
Q. There are three urns :first urn contains 1 white,2 red,3 green balls,second urn contains 2 white,1 red,1 green balls and third urn contains 4 white,5 red,3green balls. two balls are drawn from an urn chosen at random.these are found to be one white and one green. Probability that balls are drawn from third urn is,
Option
(A)15/59
(B)14/59
(C)13/59
(D)12/59 Two cars start from the same point at same time.the first car travels at a constant speed of 12 km/h while the second car travels at an initial speed of 6 km/h,which increases by 1 km/h every hour.what will be the diatance traveled by the second car by the time it meets the first car?