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The average age of all the members of Mr. Ravi’s family is 25 year. The average age of males is 30 year while the average age of females is 20 year. If the number of females in the family is 10, then find out the number of males?
  • a)
    20
  • b)
    30
  • c)
    15
  • d)
    18
  • e)
    10
Correct answer is option 'E'. Can you explain this answer?
Verified Answer
The average age of all the members of Mr. Ravi’s family is 25 ye...
Let the number of males = x
Total family members = 10 + x
25(10 + x) = 30x + 10*20
⇒ 250 + 25y = 30x + 200
⇒ 5y = 50
∴ y = 10
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Most Upvoted Answer
The average age of all the members of Mr. Ravi’s family is 25 ye...
To calculate the average age of all the members of Mr. Ravi, you would need to know the ages of all the members and then sum them up. Finally, divide the sum by the number of members.
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Community Answer
The average age of all the members of Mr. Ravi’s family is 25 ye...
30M-50=250
so M=10
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The average age of all the members of Mr. Ravi’s family is 25 year. The average age of males is 30 year while the average age of females is 20 year. If the number of females in the family is 10, then find out the number of males?a)20b)30c)15d)18e)10Correct answer is option 'E'. Can you explain this answer?
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