Problem C. 1311. (October 2015)
C. 1311. Each of the numbers \(\displaystyle \frac{1}{3}\); 0,375; 1; 1,4; \(\displaystyle \sqrt{2}\); \(\displaystyle \frac{13}{8}\); 2; \(\displaystyle \frac{13}{5}\); \(\displaystyle \frac{8}{3}\); 3; 4; \(\displaystyle \sqrt{18}\); \(\displaystyle \sqrt{32}\) is given either a plus sign or a minus sign, and then the sum is calculated. In how many different ways may we choose the signs to get \(\displaystyle 1\) as a sum?
(5 pont)
Deadline expired on 10 November 2015.
Statistics:
227 students sent a solution.  
5 points:  78 students. 
4 points:  41 students. 
3 points:  68 students. 
2 points:  27 students. 
1 point:  4 students. 
0 point:  3 students. 
Unfair, not evaluated:  4 solutions. 
Unfair, not evaluated:  2 solutions. 
