Young mathematician
One young mathematician was bored again. He found that the average age of people in the room where the seminar is held is equal to its count. Then, his 29-year-old brother entered the room. Even then, the average age of all present was the same as the count of people. How many people were in the room at the beginning?
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- statistics
- mean
- algebra
- quadratic equation
- equation
- expression of a variable from the formula
- basic functions
- reason
Units of physical quantities:
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