Posted by **james** on Tuesday, December 8, 2009 at 8:37am.

When Professor Sum was asked by Mr. Little how many students were in his classes, he answered, “All of them study either languages, physics, or not at all. One-half of them study languages only, one-fourth of them study French, one-seventh of them study physics only, and 20 do not study at all.” How many students does Professor Sum have?

## Answer This Question

## Related Questions

- Maths - When Professor Sum was asked by Mr. Little how many students in his ...
- Brain Teaser - When Professor Sum was asked by Mr. Little how many students were...
- math - 28 students,all of whom study either science,language or both.18 ...
- Maths - In a survey of 200 students of a school, it was found that 60% study ...
- Math - In a group of 40 students, all students study maths, 28 study biology and...
- statistics - A sample of the number of study per week of college students is ...
- Mathematics - A survey of 100 students produced the following statics: 32 study ...
- Math - At a school with 100 students, 35 take French, 32 take German, and 30 ...
- math - A school has 63 students studying Physics, Chemistry and Biology. 33 ...
- Math - Probabilities - There are a total of 116 foreign language students in a ...

More Related Questions