a. A president, vice president, secretary and treasurer must be selected in a class of 20students, how many ways can this be done?a. 101 342 waysb. 12 208 waysc.116 280 waysd. 1 440 waysHow manyb.а. 4distinct permutations can be done in the word OPPA?b. 8С. 12d. 24C. How many ways can the letters in the word LILLYPILLY be arranged?a. 7 560b. 10 120c. 360 360d. 206

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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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a. A president, vice president, secretary and treasurer must be selected in a students, how many ways can this be done? a. 101 342 ways b. 12 208 ways c.116 280 ways d. 1 440