SOLUTION: In how many ways can you select 4 delegates to attend a seminar from 4 supervisors, 3 managers, and 3 assistant managers if 2 of the delegates are supervisor?

Question 1017685: In how many ways can you select 4 delegates to attend a seminar from 4 supervisors, 3 managers, and 3 assistant managers if 2 of the delegates are supervisor?
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
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In how many ways can you select 4 delegates to attend a seminar from 4 supervisors, 3 managers,
and 3 assistant managers if 2 of the delegates are supervisor?
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Let me re-formulate the problem in a way how it should be formulated:

``````````````````````````````````````````
"In how many ways can you select 4 delegates to attend a seminar from 4 supervisors, 3 managers, 
and 3 assistant managers if exactly 2 of the delegates must be supervisors?"
``````````````````````````````````````````

Then the answer is:  .  =  .  = . = 6*15 = 90.

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