In a survey of xavirs\'s school of Bhubaneswar of 200 students, It was found that 120 study math
Channel: Doubtnut
Date: 26/01/2020

In a survey of xavirs\'s school of Bhubaneswar of 200 students, It was found that 120 study math, 90 study physics, 70 study shemistry, 40 study math and physics, 30 study physics and chemistry, 50 study chemistry and math and 20 study none of these subjects then the number of students study all the subjects is :