Homework Help: probabilty

Posted by melissa on Thursday, March 19, 2009 at 2:37pm.

In a school, 14% of students take drama and computer classes, and 67% take drama Class. What is the probabilty that a students takes computer class given that the student takes drama class? i have no idea how to work this so please show me your work. Thanks!!

probabilty - Damon, Thursday, March 19, 2009 at 4:58pm
This is a problem in "conditional probability".

The probability of E, given F is:
P(E/F) = P (E and F)/ P(F)

Call P(F) = drama = .67 given
Call P(E) = Computer = unknown
the P(EandF) =.14 given
Now the probability that a student takes computer given drama
= .14/.67 = .21

Answer this Question

Related Questions

Mathematics - In the universal set (U) reperesents all the students in a class....
Algebra - A high school has 900 students, 40% of whom are drama majors. A second...
Math - One fourth of class takes French. One half takes Latin One third as many ...
probability - A survey of 850 students conducted in two schools showed the ...
MATH - tHERE ARE 4 FIFTH GRADE CLASSES IN A SCHOOL. EACH CLASS Has 24 STUDENTS. ...
Math - 1/2 of class takes Spanish and 1/4 takes Chinese. 1/3 as many take French...
Math - One third of the students in mrs. hayko's class walk to school. Of ...
Math - HELP ! - there are 50 students in the seventh grade , 62 percent of these...
math - There are 37 accounting classes with 26 students in each class. Estimate ...
math - There are a total of 152 foreign language students in a high school where...

For Further Reading

First Name:
School Subject:
Answer: