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A question bank has questions of Physics and Chemistry. The number of questions of Chemistry are 3.5 times the number of questions of Physics. If there are 90 questions in the question , bank find the number of questions of Physics and Chemistry in the question bank .

Each of question given below is based on the given diagram. The diagram show students studying either Physics, Chemistry, Biology or combinations of these subjects. Which of the following is NOT represented in the above diagram ? 1)The students who study Biology, Chemistry as well as Physics. 2)The students who study Chemistry and Biology but not Physics 3)The students who do not study any of the three subjects. 4) The students who study Biology but not Physics and Chemistry. 5) The students who study Physics and Chemistry but not Biology.

In how many ways can five examination papers be arranged so that Physics and Chemistry papers never come together?

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 ?

A class has 175 students. The following data shows the number of students opting 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?

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 ?

Marks Obtained by Five Students in Physis and Chemistry What is the respective ratio between the total marks obtained by P in Physics and Chemistry together to the total marks by T in Physics and Chemistry together ?