(2)
If n(A) = 15, n(AUB) = 29, n(
AB) =
In a hostel there are 125 students, out of which 80 drink tea, 60 drink coffee and 20
drink tea and coffee both. Find the number of students who do not drink tea or coffee.
Answers
Answered by
3
Answer:
5 students do not drink tea or coffee
Answered by
1
Step-by-step explanation:
no. of students drinking tea = 80 = n(A)
no. of students drinking coffee=60 = n(B)
no. of students drinking both = n(AnB) = 20
no. of students drinking either tea or coffee
= n(AuB) = n(A)+n(B)+n(AnB)
= 80+60-20 = 120
number of students who drink tea or coffee =
total no. of students - no. of students drinking either tea or coffee[ n(AuB) ]
= 125 - 120 = 5
answer is 5
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