Question

in a hostel there are 125 STUDENTS out of which 80 drink TEA,60 drink COFFEE every student drinks atleast one drink find how many students drink BOTH tea and coffee ?

Answer 1

Answer:

Hey Mate..

Step-by-step explanation:

Here,

Total no. of students (u) = 125

Student who drink Tea (T) = 80

Student who drink Coffee (C) = 60

Students who drink both (TnC) = 20

TuC = T + C - TnC

= 80 + 60 - 20

= 120

Therefore,

Students who didn't drink Tea n' Coffee is (TuC)'

(TuC)' = U - TuC

= 125 - 120

= 5

Five Students didn't drink Tea n' Coffee both.

HOPE IT HELPED ^_^

Mark as Brainlist..

Answer 2

n(AUB)=125(A union B)
n(A)=80
n(B)=60
To find how many drink both tea and coffee :n(A intersection B)
n(AUB)=n(A)+ n(B)- n( A intersection B)
125=80+60-n(A intersection B)
125 =140- n( A intersection B)
n(A intersection B) = 125 -140=15.