Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75
B. $2.00
C. -$3.00
D. $3.00
Answer: A
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In 1999, the male population of the United States was about 133 million, and the female population was about 139 million. Assuming a Malthusian growth model with a 1.4% annual growth rate, how many more females than males will there be in 26 years? Round your answer to the nearest tenths. ?
A. 16.8 million females B. 24.3 million females C. 8.6 million females D. 4.4 million females E. 67.0 million females
Solve the problem.A rectangular playground is to be fenced off and divided in two by another fence parallel to one side of the playground. 648 feet of fencing is used. Find the dimensions of the playground that maximize the total enclosed area.
A. 81 ft by 162 ft B. 54 ft by 243 ft C. 162 ft by 162 ft D. 108 ft by 162 ft
Solve the problem.Mrs. Boyd has a desk full of quarters and nickels. If she has a total of 22 coins with a total face value of $3.10, how many of the coins are nickels?
A. 15 nickels B. 14 nickels C. 12 nickels D. 10 nickels
North Island Federal Credit Union pays 6% annual interest, compounded daily, on time savings deposits. Find the value of $1000 deposited in this account after 1 year. Round your answer to the nearest cent.
A) $1001.97 B) $1274.20 C) $1000.16 D) $849.47 E) $1061.83