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non008
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An orchestra consists of 25 members. The youngest member is 32 years old. She leaves and is replaced by a new member who is 30 years old.whaat is effect on average age , mean??
 one year ago
 one year ago
non008 Group Title
An orchestra consists of 25 members. The youngest member is 32 years old. She leaves and is replaced by a new member who is 30 years old.whaat is effect on average age , mean??
 one year ago
 one year ago

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deena123 Group TitleBest ResponseYou've already chosen the best response.2
\[\huge\frac{ 32+x_2+....+x25 }{ 25 }=y\]
 one year ago

abhi7 Group TitleBest ResponseYou've already chosen the best response.0
previously the average age is (x+32)/25..where x is the sum of ages of other 24 members..now i think you can tell what is the average age after 32 year member is replaced by 30 year old member..
 one year ago

deena123 Group TitleBest ResponseYou've already chosen the best response.2
\[\huge \frac{ 30+x_2+.....+x25 }{ 25 }=w\]
 one year ago

deena123 Group TitleBest ResponseYou've already chosen the best response.2
\[\huge \frac{25w+2}{ 25 }=y\]
 one year ago

deena123 Group TitleBest ResponseYou've already chosen the best response.2
\[\huge w=\frac{ 25y2 }{ 25 }\]
 one year ago

deena123 Group TitleBest ResponseYou've already chosen the best response.2
the mean of their ages will decrease by 0.08 ??
 one year ago

Directrix Group TitleBest ResponseYou've already chosen the best response.0
If A is the average age of the 25 people before the 32year old left, then 25*A is the sum of the ages. After the 32year old left and a 30year old joined, then (25*A  2)/25 is the new average age. (25*A  2)/25 = 25*A/25  2/25 = A  2/25 = A  8/100 = A  .08. So, does the average go down by .08 people? If so, I agree with @deena123
 one year ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.0
Let x = original average age. Original sum of ages = 25x New sum of ages = 25x  2 New mean is \[\frac{25x2}{25}=x0.08\]
 one year ago

Directrix Group TitleBest ResponseYou've already chosen the best response.0
> median?? @non008 Are you asking a second question?
 one year ago

non008 Group TitleBest ResponseYou've already chosen the best response.0
Tell me about median ?
 one year ago

non008 Group TitleBest ResponseYou've already chosen the best response.0
no median of above question.
 one year ago

Directrix Group TitleBest ResponseYou've already chosen the best response.0
I did the average problem on a smaller case with 3 people and the same problem constraints as posted. The mean went down by 2/3 a point. So, I'm conjecturing that under the same conditions but with 100 people in the group, the mean would drop by 2/100 a unit. Just saying.
 one year ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.0
The median will not change when the age of the youngest player is reduced. The median is the middle value in a ranked set of data values.
 one year ago

non008 Group TitleBest ResponseYou've already chosen the best response.0
thanks @Directrix and @kropot72
 one year ago

kropot72 Group TitleBest ResponseYou've already chosen the best response.0
You're welcome :)
 one year ago

non008 Group TitleBest ResponseYou've already chosen the best response.0
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 one year ago

pandu Group TitleBest ResponseYou've already chosen the best response.0
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 one year ago

pandu Group TitleBest ResponseYou've already chosen the best response.0
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 one year ago

pandu Group TitleBest ResponseYou've already chosen the best response.0
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 one year ago
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