Posted by Therese on Friday, February 22, 2013 at 8:53am.
Out of 4 architects, 6 engineers and 9 electricians, how many ways can a group of 6 people be formed to attend a forum if:
a. there is an equal number of architects, engineers and electricians
b. two particular engineers cannot be in the committee?
c. there are at least 3 electricians?

Math  JJ, Friday, February 22, 2013 at 1:19pm
a. equal number of each
Combinations again..
architects 4!/(2!2!)
engineers 6!/(2!4!)
electricians 9!/(2!7!)
b. remove the 2 engineers from the choices which would leave 4 architechts, 4 engineers and 9 electricians Now, we have 17 to choose from to make a group of 6.
17!/(6! 11!)

Math  Therese, Friday, February 22, 2013 at 8:32pm
Thanks much :)
Answer This Question
Related Questions
 Math  Out of 4 architects, 6 engineers and 9n electricians, how many ways can a...
 Statistics  Out of 4 architects, 6 engineers and 9n electricians, how many ways...
 Math Help  Two people are selected at random from a group of 6 pilots and 4 ...
 Math  Two people are selected at random from a group of 6 pilots and 4 ...
 math  It takes 18 electricians 35 days to wire a new housing subdivision. How ...
 math  It takes 15 electricians 24 days to wire a new housing subdivision. How ...
 math  It takes 15 electricians 24 days to wire a new housing subdivision. How ...
 Math  It takes 15 electricians 24 days to wire a new housing subdivision. How ...
 ap stats  two different sections of electricians took their state license test...
 class  Suppose that the scores of architects on a particular creativity test ...
More Related Questions