Question
Find the number of -digit numbers that can be formed using the digits if no digit is repeated. How many of these will be even?
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Text solutionVerified
digits can be selected in ways
digits can be arranged in ways
so, the number of 4 digits number formed are
for even number unit digit of the number has to be or
unit digit of the number can be selected in ways
number other than unit digit can be formed in ways ways
total number of even number will be
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Question Text | Find the number of -digit numbers that can be formed using the digits if no digit is repeated. How many of these will be even? |
Answer Type | Text solution:1 |
Upvotes | 150 |