Problem K. 457. (March 2015)
K. 457. (According to a Hungarian poem for children (http://www.mdche.u-szeged.hu/\(\displaystyle \sim\)kovacs/sheepshrine_f.html) it is a rule in the school for young sheep that students get an award for every day they do not attend the classes. On Monday, 10% of the students were absent. On Tuesday, 10% of those absent on Monday returned, but 10% of those present on Monday stayed at home. What percentage of the students will not get a reward for Tuesday?
Deadline expired on April 10, 2015.
97 students sent a solution. 6 points: 63 students. 5 points: 15 students. 4 points: 6 students. 3 points: 4 students. 2 points: 2 students. 1 point: 1 student. 0 point: 1 student. Unfair, not evaluated: 5 solutions.