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In a party of 150 persons, 75 persons take tea, 60 persons take coffee and 50 persons take milk. 15 of them take both tea and coffee, but no one taking milk takes tea. If each person in the party takes at least one drink, then what is the number of persons taking milk only ? 

This question was previously asked in
CDS Elementary Mathematics 16 April 2023 Official Paper
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  1. 50
  2. 40
  3. 30
  4. 20

Answer (Detailed Solution Below)

Option 3 : 30
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Detailed Solution

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Calculation:

Let, x number of persons taking milk only.

F2 Savita Defence 31-5-23 Sachin K D28

According to the question

60 + 15 + (x - 5) + (50 - x) + x = 150

120 + x = 150

x = 150 - 120 = 30

∴ The required value is 30.

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