How many ways can they choose 2 TVs?

Question

A consumer group plans to select 2 TVs from shipment of 8 to check picture quality .

Answer 1

Since order doesn't matter, you are trying to compute the number of combinations of 2 TVs out of 8 which is:

8! = 8 * 7

--- ----- = 28

2! 6! 2 * 1