How many 3 digit even numbers can be made using the digits 1,2,3,4,5,6,7 if no. of digit is repeated ??
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Solution = There are total 7 digits which are 1,2,3,4,5,6,7 and the digit are repeated .
Permutation of repeated digits are :
• 7! / 3!
• 7*6*5*4*3! /3!
• 7*6*5*4
• 840
Permutation of repeated digits are :
• 7! / 3!
• 7*6*5*4*3! /3!
• 7*6*5*4
• 840
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