# Simple probability prolem :/

• Jan 18th 2010, 02:14 PM
needuhelp
Simple probability prolem :/
The Bridge club has 8 boys and 3 girls. Four players are randomly selected to play at one table.

A) what is the probability of a table with 2 boys and 2 girls?

B) what i the probability of a table with atleast 2 girls?
• Jan 18th 2010, 02:19 PM
mr fantastic
Quote:

Originally Posted by needuhelp
The Bridge club has 8 boys and 3 girls. Four players are randomly selected to play at one table.

A) what is the probability of a table with 2 boys and 2 girls?

B) what i the probability of a table with atleast 2 girls?

A) $\frac{{8 \choose 2} \cdot {3 \choose 2}}{{11 \choose 4}}$.

B) At least two girls means either 2 girls and 2 boys or 3 girls and 1 boy or 4 girls and 0 boys. Calcultae each probability (use part A) as a guide) and then add them up.