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how many ways can 3 students be chosen from a class of 20 to represent their class at a banquet?

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hannah152

60 ways because the easy way to solve this problem is identify the numbers being used and than multiply them by each other.

apologiabiology

Slot method

20 options

3 slots

First slot: 20 options
Second slot: 19 options (one used up for 1st slot)
Third slot: 18 (one less than last)

Multiply them

20 times 19 times 18=6840

Answer is 6840 ways

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