Questions
How many even numbers of 3 different digits can be formed from the digits 1, 2, 3, 4, 5, 6, 7, 8, 9 (repetition of digits is not allowed)?
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a
224
b
280
c
324
d
None of these
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Correct option is A
The number will be even, if last digit is either 2, 4, 6 or 8i.e. the last digit can be filled in 4 ways and remaining two digits can be filled in 8P2, ways.Hence, required number of numbers of three different digits = 8P2×4=224Similar Questions
The total number of 5-digit numbers of different digits in which the digit in the middle is the largest is
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