Homework Help: statistics

Posted by uma on Sunday, February 20, 2011 at 1:25am.

A class consists of 50 students, 20 of them are girls and boys, 10 them are rich and remaining poor, 5 of them are fair complxioned, 3 are intelligent. What is the probability of selecting a fair complexioned rich intelligient girl?

statistics - PsyDAG, Sunday, February 20, 2011 at 10:46am
Proofread your questions before you post them.

"20 of them are girls and boys"?

I will asume 20 are girls and 30 are boys.

P(fair) = 5/50
p(rich) = 10/50
p(IQ) = 3/50
P(girl) = 20/50

Probability of all events occurring is found by multiplying the individual probabilities.

Answer this Question

Related Questions

Math 157 - A group of 10 students consists of 3 girls and 7 boys. How many ways ...
Math 156 - The ratio of girls to boys in Mr. Maddox's class of 20 students ...
math - A class of 25 students has 10 boys. Three boys have braces and 4 girls ...
statistics - A sixth form class consists of 6 girls and 9 boys. Three students ...
Maths - There are 40 pupils in a class. There are 10 more boys than girls. When ...
Math - If the ratio of girls to boys on the track team is 5 to 6 which of these ...
Math - Mrs.Smith's class has 12 girls and 8 boys. What percent of he class ...
Math - A teacher is trying to pick 7 students to represent his class at an ...
MATH - In Jessica's art class, the ratio of girls to boys is 3:2. If there ...
math ugh" - A class has 21 students . 10 boys and 11 girls . What fraction ...

For Further Reading

First Name:
School Subject:
Answer: