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Unformatted text preview: that the balls removed all have diﬀerent colors? (a) 1 4 ; (b) 2 7 ; (c) 3 11 ; (d) 4 13 ; (e) none of the above. 3. 2 cards are selected at random from an ordinary deck of 52 cards. Let X denote the number of Aces selected and let Y denote the number of Hearts selected. What is the expected value of X + Y ? 4. In how many ways can 20 cookies and 25 jellybeans be distributed to 3 boys and 4 girls if every boy gets at least 2 cookies, and every girl gets at least 1 cookie and at least 2 jellybeans? 5. Six light bulbs are selected at random from a set of 20 light bulbs of which 5 are defective. What is the probability that exactly two of the selected bulbs are defective? 2...
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This note was uploaded on 12/03/2009 for the course CSE 21 taught by Professor Graham during the Spring '07 term at UCSD.
- Spring '07