A Senate committee consists of 5 Republicans, 6 Democrats, and 2 Independents. A subcommittee of 3 members is randomly chosen. What is the probability that the subcommittee consists of 1 Republican, 1 Democrat, and 1 Independent?

Respuesta :

Solution:

The total number of ways to form a 3 person subcommittee is 13C3 = 286  

The total number of ways to choose 1 republican from 5 is 5C1 = 5.

The total number of ways to choose 1 democrat from 6 is 6C1 = 6.

The total number of ways to choose 1 independent from 2 is 2C1 = 2.

By the counting principle, there are 5 x 6 x 2 = 60 ways to select 1 republican, 1 democrat and 1 independent  

Therefore the probability that the subcommittee consists of 1 Republican, 1 Democrat, and 1 Independent is:

[tex]\frac{60}{286}=0.2098[/tex]