Applied 40S March 13, 2009
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Pi Day 2009 ... approximately.
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![Combinations (the quot;Choosequot; Formula)
A combination is arrangement of
objects where order does not matter.
On the calculator ...
Press: [MATH]
n is the number of objects
[<] (Prb)
available to be arranged
[3] (nCr)
r is the number of objects
that are being arranged.
Examples:
How many different 5 There are 15 people on the student
person teams can be council. How many 3 person
made from 10 people? subcommittees can be made on the
council?](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Applied 40S March 13, 2009
- 1. π Happy (approximation) Day! Pi Day by flickr user Liquid Lucidity
- 2. Combinations (the quot;Choosequot; Formula) A combination is arrangement of objects where order does not matter. On the calculator ... Press: [MATH] n is the number of objects [<] (Prb) available to be arranged [3] (nCr) r is the number of objects that are being arranged. Examples: How many different 5 There are 15 people on the student person teams can be council. How many 3 person made from 10 people? subcommittees can be made on the council?
- 3. Seven people reach a fork in a road. In how many ways can they continue their walk so that 4 go one way and 3 the other? HOMEWORK
- 4. (a) How many numbers of 5 different digits each can be formed from HOMEWORK the digits 0, 1, 2, 3, 4, 5, 6? (b) If one of these numbers is randomly selected, what is the probability it is even? (c) What is the probability it is divisible by 5?
- 5. You write a 10 question multiple choice test with 4 choices possible for each question. What is the probability of scoring at least 10% on the test if you guess each answer? HOMEWORK