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[COMBINATORICS]

Exercise A:
If there are 3 roads from town W to town X, 4 roads from town X to town Y and 3 roads from town Y to town Z, how many ways can one go from town W to town Z?

Exercise B:
a. 9!
b. 10!/(10-3)!
c. 7!4!

Exercise C:
a. Given : P (15, r) = 32,760, find r
b. Given : P (n, 4) = 7,920, find n

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Sagot :

Killer515idn

Answer:

Exercise A

3+4+3

from W to X is three roads. 3

from X to Y is four roads. 4

from Y to Z is three roads. 3

from W to Z is ten roads =10

Exercise C

a. Given 15x2180.4

b. Given 1980÷4

r=2180.4

n=1980

Step-by-step explanation:

yan po ang aking sagot

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