Gambler rolls two dice and gets sum
If a gambler rolls two dice and gets a sum of 10, he wins $10, and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of this game?
A. $3.06
B. -$2.78
C. -$3.06
D. $2.78
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The bullet is fired horizontally at the target, and sound of its impact is heard 0.9 seconds later. If speed of bullet is 3190 ft/sec and speed of sound is 1100 ft/sec, determine how far away is target?
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