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in a class there are 40 students they drink either tea or coffee. 20 students drink coffee and 35 students drink tea. draw a venn diagram and how many drind both coffee and tea

Answer :

subhadippal7929
tea = 35 coffee = 20
tea + coffee - both = 40 
⇒ 35+20 - both = 40
⇒ 55 - both = 40 
⇒ both = 15
SO 15 students drink both coffee &tea
View image subhadippal7929
if there are 40 students then how can you say that 20 drink tea & 35 tea because if both are added then it makes 55 but there are only 40 students in the class

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