Question

In a class of 120 students 40 studentd drink tea and 81 studnts drink coffee 12 studentss donot drink cofee and tea , thn how many students drink both coffee and tea

Answer 1

Answer:

12

Step-by-step explanation:

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Answer 2

Given:

Students in class=120

Students who drink coffee=81

Students who drink tea=40

Students who do not drink=12

To find:

The number of students who drink both tea and coffee

Solution:

The required number of both tea and coffee drinkers is 13.

We will first deduct the number of students who do not drink either tea or coffee.

So, the students who drink either tea, coffee, or both= Total students-non drinkers

=120-12

=108

Now, let the students who drink both be X.

The students who drink either tea, coffee, or both=coffee drinkers+tea drinkers-students who drink both

On putting the values, we get

108=81+40-X

108=121-X

X=121-108

X=13

So, 13 students drink both coffee and tea.

Therefore, the required number of both tea and coffee drinkers is 13.