Average age of 12man is 20 years if age of one more man is added to it the average is decreased find out the age of that man
Anonymous:
you must mentioned the decreased amount
wt is the decresed avg?
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the men who added after his age is 9 or 10 year
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Average age of 12men is 20 years if age of one more is added to it
the average is decreased by one year find out the age of that man
Solution:
Sum of ages of 12 men = average age * number of men
= 20 *12
= 240
Let the age of newly added man = x
therefore average age = sum of ages of 13 men / number of men
19 = (240 + x ) / 13
19*13 = 240+x
247 = 240 + x
247 - 240 = x
7 = x
Therefore the age of the newly added person = 7 years.
Hope this is helpful!!!
Solution:
Sum of ages of 12 men = average age * number of men
= 20 *12
= 240
Let the age of newly added man = x
therefore average age = sum of ages of 13 men / number of men
19 = (240 + x ) / 13
19*13 = 240+x
247 = 240 + x
247 - 240 = x
7 = x
Therefore the age of the newly added person = 7 years.
Hope this is helpful!!!
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