the average age of the family of five members is 24. if the present age of youngest member is 8yr , then what was the average age of the family at the time of the birth of the youngest member?
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Total age of five members of a family = 24 x 5= 120
Total age of four members at the time of birth of youngest = 120 - 8 x 5
= 120 - 40 = 80 yr
Hence, required average age =80/4= 20 yr
ANOTHER METHOD::
At present the total age of the family = 5 * 24 = 120
The total age of the family at the time of the birth of the youngest member = [120 - 8 - (8 * 4)] = 80.
Therefore, average age of the family at the time of birth of the youngest member = 80 / 4 = 20.
Total age of four members at the time of birth of youngest = 120 - 8 x 5
= 120 - 40 = 80 yr
Hence, required average age =80/4= 20 yr
ANOTHER METHOD::
At present the total age of the family = 5 * 24 = 120
The total age of the family at the time of the birth of the youngest member = [120 - 8 - (8 * 4)] = 80.
Therefore, average age of the family at the time of birth of the youngest member = 80 / 4 = 20.
hahaha... just figuring new methods so answer remains 20......check out my answer champ
where
in answers..... below your answer
23??
yepp that's right answer
your ans is wrong nitin ... & thank you for another method amudhavelVchamp
ohhhhh my mistake... sorry guyz
welcome K2patel
its ok nitinj
Answered by
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average age of 5 person is 24
total age= 24 x 5 = 120
age of youngest member 8
so, 120-8 = 112
remaining members are 4 ..then
112/4=23
total age= 24 x 5 = 120
age of youngest member 8
so, 120-8 = 112
remaining members are 4 ..then
112/4=23
Similar questions
The total age of the family at the time of the birth of the youngest member = [120 - 8 - (8 * 4)] = 80., average age of the family at the time of birth of the youngest member = 80 / 4 = 20.