Language choice

Two foreign languages are compulsory from the fourth grade. Only a tenth of the class did not choose English, and a fifth did not take German. Fifteen children learn French this way. Calculate how many pupils chose the English-German combination.

Final Answer:

b =  35

Step-by-step explanation:

a+b+c = n c = n/10 a = n/5 a+c=15  n/5+n/10=15  3n=150  n=3150=50  n=50  n/5+b+n/10=n 50/5+b+50/10=50  10b=350  b=10350=35  b=35



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