Haryana Police Constable Model Paper 5

Question : 17 of 100

Marks: +1, -0

In a group of 60 people, 27 like cold drinks and 42 like hot drinks and each person likes at least one of the two drinks. How many like both cold drink and hot drink?

Validate

Solution:

GIVEN:

\n(\A⋃\B) = 60

\n(\A) = 27 \and \n(\B) = 42

FORMULAE USED:

\n(\A∩\B) = \n(\A) + \n(\B) − \n(\A⋃\B)

CALCULATION:
Let A = Set of people who like cold drinkr

\n(\A∩\B) = 27 + 42 − 60 = 9

Therefore, 9 people like both cold drink and hot drink.

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