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  4. A five digit number be selected at random. The probability that the digits in the odd place are odd and the even places are even (repetition is not allowed)

Q. A five digit number be selected at random. The probability that the digits in the odd place are odd and the even places are even (repetition is not allowed)

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Solution:

Total number of digits used
i , e.
Number of odd digits
Number of even digits

Now, odd places can be filled by ways. Even places can be filled by ways Required way for five digit number i.e., Number of five digit numbers


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