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Tammy has 4 cds that she is going to give away. She lets her best friend choose 2 of the 4 cds. How many different groups of 2 cds are possible

Respuesta :

Answer:

6 different groups.

Step-by-step explanation:

This is the number of combinations of 2 fro m 4:

4C2  =  4! / 2! 2!

= 4 * 3 *2 *1  / (2*1*2*1

= 24/4

= 6 groups.

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