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7 come zero (Posted on 2018-06-28) Difficulty: 3 of 5
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)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re: solution Math Man2018-07-08 19:34:20
Solutionsolution Charlie2018-06-28 12:26:17
Hints/Tipsre: Part C (spoiler)...............reconsiderAdy TZIDON2018-06-28 10:10:09
Some ThoughtsPart C (spoiler)Steve Herman2018-06-28 09:38:03
First thoughts (spoiler-ish)JayDeeKay2018-06-28 08:23:36
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