SOLUTION: A class of 30 students (12 male and 18 female) are put into groups of 3. How many combinations can be formed if the requirement is that no group can be entirely all male or female?
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Question 444082: A class of 30 students (12 male and 18 female) are put into groups of 3. How many combinations can be formed if the requirement is that no group can be entirely all male or female?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nCr=Combination of n things taken r at a time.
(12C1)(18C2)+(12C2)(18C1)
=1836+1188
=3024
.
Ed
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