Solve the problem.A man has 10 shirts and 9 ties. How many different shirt and tie arrangements can he wear?
A. 100
B. 81
C. 90
D. 180
Answer: C
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Identify the set as finite or infinite.
A. Finite B. Infinite
Is the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} a group for multiplication modulo 11? ? ?
A. No B. Yes
Find the weighted mean of the numbers in the table. Round to the nearest tenth.Five rats were inoculated against a disease. After an incubation period, the number of rats contracting the disease was noted. The experiment was repeated 20 times, with the results shown in the table.
A. 2.3 rats B. 2.7 rats C. 3.1 rats D. 2.4 rats
Find the probability of the compound event.An urn contains balls numbered 1 through 15. A ball is chosen, returned to the urn, and a second ball is chosen. What is the probability that the first and second balls will be a(n) 8?
A. 
B. 
C. 
D. 