self Maths Puzzle

A bag contains five balls,3 red and 2 white.balls are removed one at a time(without replacement) till all red balls are removed or all white balls are removed.What is the probability that the last ball removed is white?

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self Other Question

A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times itself at the same rate of interest in? from the pack of 52 cards ,three cards r drawn at random,find the probability of drawing a king,a queen and jack