Three groups

In the company, employees are divided into three groups. In the first group, which includes 12% of the company's total number of employees, the average salary is CZK 40,000, in the second group CZK 35,000, in the third group CZK 25,000. The average salary of all company employees is CZK 33,000.
How many percent of employees are in the third group?

Correct answer:

p3 =  26 %

Step-by-step explanation:

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