The average age of 8 persons in a commitee is increased by 2 years when two men aged 35 years and 45 years are substituted by two women find the average age of the two women
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Posted on 29 Nov, 2014 3:40 PM
Assume average age of 8 persons as X
Then total Age is = 8X
Two persons 35 & 45 are removed and replaced with 2Y( since two persons are replaced) ages
=8X-80+2Y
New average is = (8X-80+2Y)/8
This new average is equal to Previous average plus 2
That is (8X-80+2Y)/8=X+2
Solve to find individual average which will be Y = 48
Ok make me Brainlist.
Assume average age of 8 persons as X
Then total Age is = 8X
Two persons 35 & 45 are removed and replaced with 2Y( since two persons are replaced) ages
=8X-80+2Y
New average is = (8X-80+2Y)/8
This new average is equal to Previous average plus 2
That is (8X-80+2Y)/8=X+2
Solve to find individual average which will be Y = 48
Ok make me Brainlist.
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