a bag contains 4 green and 6 white balls.two balls are drawn one by one without replacement.if the second drawn ball is white.what is the probability that the first ball is also white

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Please find below the solution to the asked query:

6 white balls and 4 green balls10 ballsFirst ball will either be white or red, henceRequired Probability=First ball is white AND second ball is whiteFirst ball is white AND second ball is white OR First ball is green AND second ball is white=610×59610×59+410×69=6×56×5+6×4=55+4=59 Answer

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