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.
In a competitive exam 50 students passed in English. 60 students passed in Mathematics.
Answers
Answered by
7
Answer:
Step-by-step explanation:
Given: n(A) = 80, n(B) = 60 and n (A ∩ B) = x = 20
Total number of students = 125
n(A) = number of students who drink tea
n(B) = number of students who drink coffee
n (A ∩ B) = number of students who drink both tea and coffee
n (A ∪ B) = number of students who drink either tea or coffee
As we know, n (A ∪ B) = n(A) + n(B) - n (A ∩ B)
⇒ n (A ∪ B) = 80 + 60 - 20
⇒ n (A ∪ B) = 140 - 20
⇒ n (A ∪ B) = 120
Then, the number of students who do not drink tea or coffee = 125 – 120
= 5
Answered by
2
Answer:
Step-by-step explanation:
The attached ven diagram will definitely clear your concept...
PLEASE MARK ME BRAINLIEST...... ;)
Attachments:
Similar questions
Computer Science,
4 months ago
Math,
4 months ago
Social Sciences,
8 months ago
English,
8 months ago
Math,
11 months ago