in a class of 120 students 80 students study mathematics , 45 study history and 20 students neither study history nor study mathematics. what is the number of students who study both mathematics and history?
Dey told in a class of 120 students, dey didnt told dat how many students r der in class. . So in a class of 120 students more student also can sit. . So here dey say dat 80 students r studin mathematics,45 studing studin history and 20 students r nt doin anythng. . So add all students(80+45+20)-in a class of (120) students=145-120= 25 students studin both subjects. .
Dey told in a class of 120 students, dey didnt told dat how many students r der in class. . So in a class of 120 students more student also can sit. .
So here dey say dat 80 students r studin mathematics,45 studing studin history and 20 students r nt doin anythng. .
So add all students(80+45+20)-in a class of (120) students=145-120= 25 students studin both subjects. .