The numbers of hours worked (per week) by 400 business students are shown below.

Number of hours	Frequency
0 - 9	20
10 - 19	80
20 - 29	200
30 - 39	100

The percentage of business students working at least 20 hours per week is

	a.	75%
	b.	85%
	c.	95%
	d.	99%
	e.	None of the above

2-

The ACT scores of a sample of business school students and their genders are shown below.

ACT Score
Gender	Less than 20	20 up to 25	More than 25	Total
Female	24	168	48	240
Male	40	96	24	160
Total	64	264	72	400

How many students scored 20 or less?

	a.	64
	b.	24
	c.	0.95
	d.	0.25
	e.	None of the above

3-

The ACT scores of a sample of business school students and their genders are shown below.

ACT Score
Gender	Less than 20	20 up to 25	More than 25	Total
Female	24	168	48	240
Male	40	96	24	160
Total	64	264	72	400

What was the proportion of male students?

	a.	0.5
	b.	0.4
	c.	0.7
	d.	0.3
	e.	None of the above