322 Appendix A
- The number of combinations of 5 things
taken 2 at a time = 10. - The number of different committees of 5
people that can be chosen from a group of
12 people is 792. - If you are going to choose 3 toppings from a
list of 12 possibilities and the order in which
you put toppings on does not matter, you
have 220 sundaes to choose from. - The probability of drawing a heart and then
a queen is^13
52
4
521
44
521
52.
- The probability of drawing a heart and then
a heart is^13
52
13
521
41
41
16.
- The probability of drawing a black card and
then a red card is^26
52
26
521
21
21
4.
- The probability of drawing a king and a
queen is^4
52
4
5116
26524
663×= =.
- The probability of drawing two black cards
is^26
52
25
511
225
5225
104.
- The probability that the marble chosen is
red or blue is^4 ^6
24
10
245
12.
- The probability that the chosen marble is
yellow or blue is^2 ^4
24
6
241
4.
- The probability that the marble is green or
white is^9 ^3
24
12
241
2.
- The probability that the chosen marble is
yellow or red is^2 ^6
24
8
241
3.
- The probability that the marble is red or
orange is^6 ^0
24
6
241
4.
29.
80
x
cos76 30 ,x^80 342.7
cos76 30 ,
cos76^80
x,
x ^80 330.7
cos76,
AB = 343 (331) feet- tan32^58 x,
x ^58
tan3292.8^
Side YZ is 58 m.
Find the length of XY to the nearest
centimeter. XY } 93Chapter 18
- 2 v 4 = 8
- 2 v 5 v 4 = 40
- 2 v 5 v 3 v 4 = 120
- 2 v 5 v 4 v 4 = 160
- 2 v 5 v 4 v 3 v 2 v 4 = 960
- 6! = 6 v 5 v 4 v 3 v 2 v 1 = 720.
- 7! = 7 v 6 v 5 v 4 v 3 v 2 v 1 = 5,040.
- 7! z 6 = 840.
- The permutations of 9 things taken 3 at a
time = 504. - The permutations of 10 things taken 4 at a
time = 5,040. - The number of combinations of 6 things
taken 3 at a time = 20. - The number of combinations of 7 things
taken 4 at a time = 35.