# Precal Ch 9 Discrete Math

20 Questions | Total Attempts: 141  Settings  Ch 9 discrete mathematics quiz (9. 1 - 9. 4)

• 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.
There are two precalculus sections at Roosevelt High School.  There 12 girls and 8 boys in the 1st period, while there are 10 girls and 15 boys in the 3rd period.  If a precalculus student chosen at random happens to be a girl, what is the probability she is from the 1st period?
• 10.
If it rains tomorrow, the probability is 0.8 that John will practice his piano lesson.  If it does not rain tomorrow, there is only a 0.4 chance that John will practice.  Suppose that the chance of rain tomorrow is 40%.  What is the probability that John will practice his piano lesson? (Hint: Use a tree diagram)
• 11.
Find the first 4 terms and the 20th 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.
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