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2. How many ways can a president and vice-president be selected in a class of five students? а. 20 С. 120 b. 24 d. 190 3. Participants 4, 5, 6, and 7 start a race. In how many different orders can they finish the race? a. 24 C. 49 b. 30 d. 81

2. How many ways can a president and vice-president be selected in a class of five students? а. 20 С. 120 b. 24 d. 190 3. Participants 4, 5, 6, and 7 start a race. In how many different orders can they finish the race? a. 24 C. 49 b. 30 d. 81

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:PROBLEM SOLVING INVOLVING PERMUTATIONS AND COMBINATIONS Encircle the letter of the correct answer.
2. How many ways can a president and vice-president be selected in a class of five students? 20 С. 120 b. 24 d. 190 3. Participants 4, 5, 6, and 7 start a race. In how many different orders can they finish the race? а. 24 с. 49 b. 30 d. 81
Transcribed Image Text:2. How many ways can a president and vice-president be selected in a class of five students? 20 С. 120 b. 24 d. 190 3. Participants 4, 5, 6, and 7 start a race. In how many different orders can they finish the race? а. 24 с. 49 b. 30 d. 81
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