In a hostel there are 110 students, out of which 20 do not drink tea or
coffee. 70 students drink tea and 50 students drink coffee. How many
students drink tea and coffee both? How many students drink only
coffee?
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0
Answer:
30 drink both tea and codfee
40 drink coffee only
Answered by
1
T-stands for tea drinkers
C-coffee drinkers
n(TUC)= 110-20 = 90
As 20 take neither
n(T) = 70
n(C) = 50
& n(TUC) = n(T) + n(C) -n(T& C )
90 = 70 + 50 -x
X= 120-90 =30
C-coffee drinkers
n(TUC)= 110-20 = 90
As 20 take neither
n(T) = 70
n(C) = 50
& n(TUC) = n(T) + n(C) -n(T& C )
90 = 70 + 50 -x
X= 120-90 =30
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