perplexus.info :: Probability : 7 come zero

7 come zero (Posted on 2018-06-28)

Let N be a randomly chosen 5-digit number.

a. What is the probability that N contains at least one zero?
b. What is the probability that N contains at least one 7?
c. What is the probability that it contains exactly one zero and one 7?

d. Generalize the above questions for a n-digit number , n>1.

No Solution Yet Submitted by Ady TZIDON

Rating: 5.0000 (1 votes)

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Subject	Author	Date
re: solution	Math Man	2018-07-08 19:34:20
solution	Charlie	2018-06-28 12:26:17
re: Part C (spoiler)...............reconsider	Ady TZIDON	2018-06-28 10:10:09
Part C (spoiler)	Steve Herman	2018-06-28 09:38:03
First thoughts (spoiler-ish)	JayDeeKay	2018-06-28 08:23:36

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