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Mathematics 9 Online
OpenStudy (anonymous):

Joe goes to a Mexican restaurant and order nachos. He can have just cheese or add any of the following :chicken,onion,,sour cream or olives. How many different variations of nachos are possible.?

OpenStudy (anonymous):

4choose0+ 4choose1 +4choose2 +4choose3 +4choose4

OpenStudy (anonymous):

1+4+6+4+1

OpenStudy (anonymous):

16

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