In a class of 80 students numbered 1 to 80, all even numbered students opt for physics, whose numbers are divisible by 5 opt for chemistry and those who are divisible by 7 opt for mathematics. Number of students who offered mathematics

In a class 140 students numbered 1 to 140, all even numbered students opted Mathematics course,those whose number is divisible by 3 opted Physics course and those whose number is divisible by 5 opted Chemistry course.Then the number of students who did not opt for any of the three courses is (a) 38(b) 1(c) 42 (d) 102

What is the number of students who opted for dancing ?

Find the central angle of total number of students who opted for History ?

In a class of 175 students the following data shows the number of students opting one or more subjects Mathematics 100, physics 70, chemistry 28, physics and Chemistry 23, mathematics physics and chemistry 18. how many students have offered mathematics alone ?

4.In a class of 36 students,1/3 of the students scored A in mathematics exam,1/2 of them scored B and the rest scored C .Find the numbers of students who scored C in mathematics exam.

Out of 1800 students in a school, 750 opted basketball, 800 opted cricket and remaining opted table tennis. If a student can opt only one game, find the ratio of (a) Number of students who opted basketball to the number of students who opted table tennis. (b) Number of students who opted cricket to the number of students opting basketball. (c) Number of students who opted basketball to the total number of students.

In a school some of the students opted for the NSS and some opted for gardening. Three times the number of students opting for NSS is 10 less than twice the number of students opting for gardening. One-third the number of students opting for NSS is equal to one-fifth the number of students opting for gardening. Find the number of students opting for NSS and gardening respectively.

By what percent is the number of candidats who opted for music more than those who opted for sports ?