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anonymous
 5 years ago
Q11 How many numbers consisting of two digits can be formed from 2, 3 5,7. Each integer is to be used only once
anonymous
 5 years ago
Q11 How many numbers consisting of two digits can be formed from 2, 3 5,7. Each integer is to be used only once

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0That's because the order of the numbers forming the integer matters. Each integer can be only be used once.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0If you used 4C2, then e.g. 23 and 32 will be counted as one combination. Using 4P2, counts them as two different combinations. They are two distinct integers after all.
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