Question

In a survey of 120 students ,it was found that 17 drink neither tea nor coffee, 88 drink tea and 26 drink coffee. Find the number of people who drink both tea and coffee.

Answer 1

Answer:

11 students drink both tea and coffee

Answer 2

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Given,

Total number of students = 600

Number of students who were drinking Tea = n(T) = 150

Number of students who were drinking Coffee = n(C) = 225

Number of students who were drinking both Tea and Coffee = n(T ∩ C) = 100

n(T U C) = n(T) + n(C) – n(T ∩ C)

= 150 + 225 -100

= 375 – 100

= 275

Hence, the number of students who are drinking neither Tea nor Coffee = 600 – 275 = 325

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Hope It's Helpful.....:)