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Problem C. 1332. (January 2016)

C. 1332. Vicky's grandma buys one lottery ticket per week. What is the probability that she will not win at all during the course of a whole year (in 52 weekly draws)? (In the lottery, 5 numbers are drawn out of 90. A ticket will win if at least 2 are marked out of the five numbers drawn.)

(5 pont)

Deadline expired on 10 February 2016.


Statistics:

163 students sent a solution.
5 points:103 students.
4 points:11 students.
3 points:9 students.
2 points:4 students.
1 point:12 students.
0 point:23 students.
Unfair, not evaluated:1 solution.

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