Nvidia Interview Question | Same Marble

Question

A jar contains 4 marbles. 3 Red & 1 white. Two marbles are drawn with replacement after each draw. What is the probability that the same color marble is drawn twice?

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Dhruv2301 55 years 4 Answers 1060 views Great Grand Master 0

Answers ( 4 )

  1. The probability that the same color marble is drawn twice = 3/4*3/4=9/16

  2. The probability that the same color will be drawn twice, is the sum that red marble has drawn twice + the sum that white marble has drawn twice.
    The Probability of getting a red marble = 3/4 *3/4 =9/16
    The Probability of getting a white marble = 1/4*1/4 =1/16
    Total Probability = 9/16+1/16 =10/16

  3. The probabilty of getting red ball twice = 3/4*3/4 = 9/16
    The probability of getting white twice= 1/4*1/4 = 1/16

    Adding the probabilities = 10/16

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