In a group of 80 people 50 do not drink coffee and 30 do not drink tea what can be the maximum number of people who drink both tea and coffee
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total = 80
Do not drink Coffee = 50. => Drink coffee = 80-50 = 30
Do not drink Tea = 30 => Drink Tea = 80 - 30 = 50
So maximum number of people who drink both Tea and Coffee = 30,
as in sets: A ∧ B ⊆ A and A ∧ B ⊆ B
Do not drink Coffee = 50. => Drink coffee = 80-50 = 30
Do not drink Tea = 30 => Drink Tea = 80 - 30 = 50
So maximum number of people who drink both Tea and Coffee = 30,
as in sets: A ∧ B ⊆ A and A ∧ B ⊆ B
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