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The probability that out of 10 person, a...

The probability that out of 10 person, all born in June, at least two have the same birthday is

A

`(""^(30 C_(10)))/((30)^(10))`

B

`1 - (""^(30) C_(10))/(30!) `

C

`((30)^(10) - ""^(30) C_(10))/((30)^(10)) `

D

None of these

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The correct Answer is:
D
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