LG Wireless Phone

Combination Math Problem. How many different cell phones can be selected from a shipment of twenty-four cells?

Combination Math Problem. How many different cell phones can be selected from a shipment of twenty-four cell phones? I know it can be written as 24C5. How many different combinations? Do you have to have a calculator to do this problem?

Public Comments

1. Don't use calculator it limits your brain and slows down your math learning easy way it to use the combination formula. 24*23*22*21*20/(5*4*3*2) = 42,504 5*4 gets rid of 20 3 reduces 21 to 7 2 reduces 24 to 12 then you have 12*23*22*7 easy way to do this is (10* 23 + 46) = 276 now 20*276 + 2*276 = 6072 and finally you can do 6072*7 = 42,504 hope it helps
2. 24 C 5 can be written as 24 X 23 X 22 X 21 X 20 ~~~~~~~~~~~~~~~~~ 5 X 4 X 3 X 2 X 1 Hope u got the answer.