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The average age of five persons is 60 years. The average age of first four persons is 40 years. What is the age of the fifth person ?
- A100 years
- B120 years
- C140 years
- D130 years
Answer not set
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CCommunity
Solution
Sum of ages of 5 persons = $5 \times 60 = 300$
Sum of ages of first 4 persons = $4 \times 40 = 160$
=> Age of fifth person = $300 - 160 = 140$ years
Sum of ages of 5 persons = $5 \times 60 = 300$
Sum of ages of first 4 persons = $4 \times 40 = 160$
=> Age of fifth person = $300 - 160 = 140$ years
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CCommunity
Solution
Sum of ages of 5 persons = $5 \times 60 = 300$
Sum of ages of first 4 persons = $4 \times 40 = 160$
=> Age of fifth person = $300 - 160 = 140$ years
Sum of ages of 5 persons = $5 \times 60 = 300$
Sum of ages of first 4 persons = $4 \times 40 = 160$
=> Age of fifth person = $300 - 160 = 140$ years