Two trains enter at the opposite sides of a tunnel of length L with speeds 'V'. A particle enters the tunnel at the same time with a speed 'v' and it vibrates in the tunnel[i.e. if it reaches the end of the tunnel then it comes back]. What is the position of the particle by the time the 2 trains meet?
764There are two urns A and B and an equal number of red balls and blue balls.How do u place the balls in the urns such that the probability of picking up the red ball is greater?
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