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A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory. There are seniors, juniors, and sophomores who applied. Each senior's name is placed in the lottery times; each junior's name, times; and each sophomore's name, time. What is the probability that a senior's name will be chosen?
(A) 1/8 (B) 2/9 (C) 2/7 (D) 3/8 (E) 1/2 

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The projected sales volume of a video game cartridge is given by the function where is the number of cartridges sold, in thousands; is the price per cartridge, in dollars; and is a constant. If according to the projections, cartridges are sold at per cartridge, how many cartridges will be sold at per cartridge?
(A) 20,000 (B) 50,000 (C) 60,000 (D) 150,000 (E 200,000 

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If is divisible by , , and , which of the following is also divisible by these numbers?
(A) k+5 (B) k+15 (C) k+20 (D) k+30 (E) k+45 

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The average of a set of 10 numbers is 15. If one number is taken out the average of the remaining numbers is 16. What is the value of the number removed? 

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A car traveling at an average rate of 54 kilometers per hour made a trip in 5 hours. If it had traveled at an average speed of 60 meters per hour, how many minutes less would the trip have taken? 

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