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Determine how many different possibilities for two-digit numbers 1,5,3,6,9
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Determine how many different possibilities for two-digit numbers 1,5,3,6,9

User Artanis Zeratul
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1 Answer

5 votes

Answer:

Explanation:

unit place can be selected in ways=5

ten's place can be selected in ways=5

total numbers=5×5=25

but if the numbers at two places is different then number of ways=5×4=20

User David Carmo
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