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How many 6 - digit numbers can be formed...

How many 6 - digit numbers can be formed the digits 0, 1, 3, 5, 7 and 9 which are divisible by 10 and no digit is repeated ?

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A number is divisible by 10 if zero is fixed at unit place. Now we have to fill up 5 places with the five digits (1, 3, 5, 7, 9) which can be done in 5! Ways = 120 ways.
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