Who likes math?

[closer2313]

144

[Thythe]

it's 144, trust them.

[Sephus]

there are ten different 1st digits (0-9), ten different 2nd digits, and ten different 3rd digits. how many different combinations of digits are there if you must select one of each group of digits to make a 3 digit number?

i counted to 156 from 000 when i got tired of counting. i'll never make it to 999 and find out the answer.

[DasLeben]

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when you do math problems like this, you should ask yourself when you get your answer, 'does this make sense?'

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I prefer "TLAR." "That Looks About Right." Good for flying aircraft, good for math. [img]/images/graemlins/tongue.gif[/img]

[TaoTe]

I choose not to reply to this post.

[tonypaladino]

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144

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[Brainwalter]

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I came up with 144 the first time I did it. But since they can only choose one of each book I thought it was wrong. For instance isn't 2 statistics books and 1 geometry book one of the possibilities of the 144?

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No, it's not.

Suppose I have 1 book A and 1 book B. How many combinations are there if I select 1 of each type?
1 * 1 = 1

Suppose I have 2 Book A and 2 book B. How many combos, once again selecting 1 of each?
2 * 2 = 4

Thats how you do these sorts of problems.
What are they teaching you guys in school nowadays, anyways?