Question

In a class of 400 students, 180 read english, 270 read hindi and 371 read sanskrit, at least how many students read all the three subjects.

Answer 1

Answer:Let A be the set of people who don't read English, B the set of people who don't read Sanskrit, C the set of people who don't read Hindi. The number of people who don't read all three languages is

#(A∪B∪C)≤#(A)+#(B)+#(C)=220+29+130=379,

so the number of people who do read all three languages is at least 400−379=21.

Step-by-step explanation: