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Total number of 6-digit numbers in which only one digit is repeated and all the five digits 1, 3, 5, 7 and 9 appear, is …

Q1

Total number of 6-digit numbers in which only one digit is repeated and all the five digits 1, 3, 5, 7 and 9 appear, is

[JEE Main 2020, 7 Jan (Shift 1)]

a

\( 5^{6} \)

b

\( (\frac{1}{2}) \times 6! \)

c

\( 6! \)

d

\( (\frac{5}{2}) \times 6! \)

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