Question

2. in a colledge there 20

students enrolled in commerce
only 90 students erolled in
mathematics only, 30 students enrolled
in both math & commerce and 60
enrolled for others. Find
The total number of stydents in a
colledge
​

Answer 1

there are 200 students

Explanation:

let no if students enrolled in commerce be nA) and mathematics be n(B)

n only(A)=20

n only(B)=90

n (A intersection B)=30

n(AUB)=60

now

n(U)=20+90+30+60

n(U)=200