Contingency Tables
	Piercings
BirthOrder	0	1	2	3	4	5	6	9	Total
1		31		1		8		2		3		5		4		0		54
2		17		2		4		0		0		2		1		1		27
3		6		0		2		0		2		0		0		0		10
4		3		0		2		0		0		1		0		0		6
5		1		0		0		0		0		1		0		0		2
7		0		0		1		0		0		0		0		0		1
Total		58		3		17		2		5		9		5		1		100

If you picked someone at random, what is the probability that the person:

1. has the same number of piercings as his/her birth order?
2. has no more piercings than his/her birth order number?
3. has 3 or more piercings if his/her birth order is more than 2?