Class 9A

On the final certificate have one quarter of the class 9A mark "C" of mathematics, seventh mark "C" from the Czech language and two students failed in chemistry. How many students attend class 9A?

Result

n =  28

Solution:

4=22 7 ... primenumber LCM(4,7)=227=28  n=LCM(4,7)=284=2^2 \ \\ 7 \ ... \ prime number \ \\ LCM(4, 7)=2^2 \cdot 7=28 \ \\ \ \\ n=LCM(4,7)=28



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