Home
Class 11
MATHS
In a school there are 20 teachers who te...

In a school there are 20 teachers who teach mathematics or physics. Of these, 12 teach mathematics and 4 teach both physics and mathematics. How many teach physics ?

Text Solution

Verified by Experts

The correct Answer is:
12
Promotional Banner

Similar Questions

Explore conceptually related problems

In a school , there are 20 teachers who teach Mathematics or physics .Of these , 12 teach Mathematics and 4 teach both Physics andMathematics. How many teach Physics ?

A class has 175 students. The following data shows the number of students obtaining one or more subjects . Mathematics 100 , Physics 70 , Chemistry 40 , Mathematics and Physics 30 , Mathematics and Chemistry 28 , Physics and Chemistry 23 , Mathematics , Physics and Chemistry 18. How many students have offered Mathematics alone ?

From 50 students taking examinations in mathematics ,physics and chemistry ,37 passed mathematics, 24 physics and 43 chemistry. At most 19 passed mathematics and physics, at most 29 Mathematics and Chemistry and at most 20 Physics and Chemistry. The largest possible number that could have passed all three examinations is:

A Class has 175 students .The following data shown the number of student : Physics 70 : Chemistry 40 : Mathematics 100 : Physics and Chemistry 23: Mathematics and Chemistry 28 Mathematics Physics and Chemistry 18 .How many students have offered Mathematics alone ?

In a class of 55 students, the number of students studying different subjects are 23 in Mathematics, 24 in Physics, 19 in Chemistry, 12 in Mathematics and Physics, 9 in Mathematics and Chemistry, 7 in Physics and Chemistry and 4 in all the three subjects. Find the number of students who have taken exactly one subject.

Mathematics is the language of physics. Justify the statement.

72% of 25 students are good in mathematics.How many are not good in mathematics?

In a survey of 200 students of a school, it was found that 120 study Mathematics, 90 study Physics and 70 study Chemistry , 40 study Mathematics and Physics, 30 study Physics and Chemistry, 50 study Chemistry and Mathematics and 20 none of these subjects. Find the number of students who study all the three subjects.

In class of 175 students the following data shows the number of students opting one or more subjects. Mathmatics 100, Physics 70 , Chemistry 40, Mathematics and Physics 30 , Mathematics and Chemistry 28, Physics and Chemistry 23, Mathematics , Physics and Chemistry 18 , The number of students who have opted Mathematics along is :

From 50 students taking examinations in Mathematics, Physics and Chemistry , 37 passed Mathematics , 24 Physics and 43 Chemistry .At most 19 passed Mathematics and Physics , at most 29 Mathematics and Chemistry and at most 20 Physics and Chemistry . The largest possible number that could have passed all three examinations is :