perplexus.info :: Probability : Cinq Digit Choice

Cinq Digit Choice (Posted on 2014-09-22)

A five digit positive integer N without a leading zero is selected at random.

Determine the probability that the sum of the first digit, third digit and fifth digit of N is equal the product of its second digit and fourth digit.

Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Solution: (Hide)

The required probability is 869/45000 =~0.019311111
For an explanation, refer to the solution submitted by Charlie in this location.

Comments: ( You must be logged in to post comments.)

	Subject	Author	Date
	computer solution (spoiler)	Charlie	2014-09-22 16:29:18

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