how to do Counting principle ?

  • Thread starter Thread starter Poobalan C
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Poobalan C

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3 teachers are assigned to teach for 6 classes. in how many ways can the teachers be assigned if

a) each of them is assigned for two classes.
b) one is assigned for one class, one is assigned for two classes and one is assigned for three classes.

how to solve this question? what formula should i use?

thank you.
 
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