20 Questions

Ch 9 discrete mathematics quiz (9. 1 - 9. 4)

Questions and Answers

- 1.Count the number of ways that each procedure can be done. Line up 4 people (Mr. Han, Ms. Aguirre, Ms. Torres, and Mr. Birko) for a photograph.
- 2.Arrange five books (English, Pre Calculus, Physics, U.S. History, and Korean) on a bookshelf.
- 3.How many different answer keys are possible for a 10-question True-False Test?
- 4.How many different license plates consist of five symbols, either digits or letters?
- 5.Mr. Han gives 20 study questions, from which he will select 8 to be answered on the final exam. How many ways can he select the questions?
- 6.The card game “bid Euchre” uses a pack of 24 cards, consisting of ace, king, queen, jack, 10, and 9 in each of the four suits (spades, hearts, diamonds, and clubs). In bid Euchre, a hand consists of 6 cards. Find the probability of each event. A hand is all spades.
- 7.All six cards are from the same suit.
- 8.A hand includes all four aces.
- 9.
- 10.
- 11.Find the first 4 terms and the 20
^{th}term of the sequences. - 12.
- 13.
- 14.Find the first 4 terms only.
- 15.
*In 15 – 18, the sequences are arithmetic or geometric.**Find a recursive formula for the nth term.*-5, -1, 3, 7, . . . - 16.1/8,-1/4,1/2,-1,…
- 17.
*Find an explicit formula for the nth term.*-5, -1, 3, 7, . . . - 18.1/8,-1/4,1/2,-1,…
- 19.Solve the equation algebraically. x = ?
- 20.