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

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

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The digit in the unit place of the numbers divisible by 10 is `0 .`
The other numbers `1,3,5,7` and 9 can be arranged in 51 wàys.
`therefore` Number of 6 digit numbers `=5 !=120`
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