# Probability Question

• Mar 6th 2010, 02:10 AM
dalollis
Probability Question
Need some help with this.

A survey has been undertaken to determine if there is a relationship between place of residence and type of dwelling. The table presents data from a random sample of 650 households.
Type of Dwelling
Place Owns Home Owns Condo Rents Apartment
Large City 20 100 180
Suburb 120 45 60
Rural 95 25 5

a.)What is the probability that the household lives in a suburb and owns a condo?
b.)What is the probability that the household lives in a large city?
c.)What is the probability that the household lives in a large city or rents an apartment?

Thanks
• Mar 6th 2010, 02:55 AM
u2_wa
Quote:

Originally Posted by dalollis
Need some help with this.

A survey has been undertaken to determine if there is a relationship between place of residence and type of dwelling. The table presents data from a random sample of 650 households.
Type of Dwelling
Place Owns Home Owns Condo Rents Apartment
Large City 20 100 180
Suburb 120 45 60
Rural 95 25 5

a.)What is the probability that the household lives in a suburb and owns a condo?
b.)What is the probability that the household lives in a large city?
c.)What is the probability that the household lives in a large city or rents an apartment?

Thanks(Rofl)

Hello:
a) prob. $\displaystyle = \frac{45}{650}$
• Mar 6th 2010, 02:59 AM
u2_wa
b)prob.$\displaystyle =\frac{20+100+180}{650}$$\displaystyle =\frac{6}{13}$

c)prob.$\displaystyle =\frac{20+100+180+60+5}{650}=\frac{73}{130}$
• Mar 6th 2010, 03:19 AM
dalollis
other questions
d.)
What is the probability that the household owns a home given that they live in a suburb? is it 120÷225= 8÷15 ?
e.)
What is the probability that the household lives in a suburb or large city?
• Mar 6th 2010, 03:52 AM
u2_wa
Quote:

Originally Posted by dalollis
Thanks WA!

d) is correct

e)prob.$\displaystyle =\frac{200+225}{650}$