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Question

What is the sum of all four digit numbers formed by using the digits 2,3,4 and 5 without repetition?

A
93324
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B
92314
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C
93024
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D
91242
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Solution

The correct option is A 93324
2,3,4,5
No repetition
Number of given digits =n=4
Sum of digits
2+3+4+514
Sum of all four digits formed
(n1)!(sumofdigits)(1111....ntimes)(n1)!(14)(1111)3!×14×11116×14×111184×111193324
Option :A

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