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A bag contains 4 balls. Two balls are drawn at random (without
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A bag contains 4 balls. Two balls are drawn at random (without replacement) and are found to be white. What is the probability that all balls in the bag are white?

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Question 1
All kings, queens are aces are removed from a pack of 52 cards. The remaining cards are well shuffled and then a card is drawn from it. Find the probability that the drawn card is :a black face card (b)  a red card.

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Question 2
A bag contains some white and some black balls, all combinations of balls being equally likely. The total number of balls in the bag is 10. If there ball are drawn at random without replacement and all of them are found to be black, the probability that the bag contains 1 white and 9 black balls is b. c. d.

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Question 3
Find the mean variance for the following probability distribution :X0123P(X)

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Question 4
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Question Text
A bag contains 4 balls. Two balls are drawn at random (without replacement) and are found to be white. What is the probability that all balls in the bag are white?