taiwan-gsat 2010 Q3

taiwan-gsat · Other · gsat__math Discrete Probability Distributions Expectation and Variance from Context-Based Random Variables
3. A box contains three red balls and three white balls. A lottery game involves randomly drawing two balls simultaneously from the box. If the two balls are different colors, the player wins 100 dollars; if the two balls are the same color, there is no prize. What is the expected value of the prize for this game?
(1) 20 dollars
(2) 30 dollars
(3) 40 dollars
(4) 50 dollars
(5) 60 dollars
& 5 & \multirow{3}{*}{B} & 15 & － & & 25 & 7 
3. A box contains three red balls and three white balls. A lottery game involves randomly drawing two balls simultaneously from the box. If the two balls are different colors, the player wins 100 dollars; if the two balls are the same color, there is no prize. What is the expected value of the prize for this game?\\
(1) 20 dollars\\
(2) 30 dollars\\
(3) 40 dollars\\
(4) 50 dollars\\
(5) 60 dollars
Paper Questions
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