math_celebrity Administrator Staff member Aug 3, 2018 #1 Chris has 6 cds that he is going to give away. He let his best friend choose 2 of the 6 cds. How many different groups of 2cds are possible? We want 6 choose 2 using combinations. We use combinations because the problem states the word different. 6 C 2 using our calculator is 15.
Chris has 6 cds that he is going to give away. He let his best friend choose 2 of the 6 cds. How many different groups of 2cds are possible? We want 6 choose 2 using combinations. We use combinations because the problem states the word different. 6 C 2 using our calculator is 15.
