Math question

Test Preparation SAT Preparation
1

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<p>Im dreadful at these permutation and combination problems</p>

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2

<p>is the answer 24?</p>

3

<p>Also I know the ncr formula but don’t know how to apply it when order matters</p>

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4

<p>Yes thats the answer</p>

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5

<p>My reasoning is the following:</p>

<p>Total 4 letters but since you can only have 3 letters, and use each letter once…</p>

<p>that means there are 3 slots, not repeating.</p>

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<p>4 x 3 x 2</p>

<p>4 to choose for the first slot, 3 to choose from for the 2nd slot, and 2 to choose from for the last slot.</p>

6

<p>Oh ok that makes perfect sense thank you </p>

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7

<p>no problem, im not usually good at these kind of problems but i sometimes get em.</p>