the avg of 8 men is increased by 2 years when one of them whose age is 24 is replaced by freshman what is his age?
let avg =x.
so sum is 8x
sum replaced 8(x+2)-24+y

  1. 👍 1
  2. 👎 0
  3. 👁 116
  1. 8(x+2) = 8x-24+y
    8x+16 = 8x-24+y
    40 = y

    It doesn't matter what the average age is. Replacing a 24-year-old by a 40-year-old adds 16 years to the total ages, raising the average by 2.

    1. 👍 0
    2. 👎 0
    posted by Steve

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    For the men age 18 and over the avg height was 69 inches with an SD of 3 inches and avg weight was 190 lbs with an SD of 42 pounds. the r value is around 0.41. Estimate the average weight of the men whose heights were 66in, 24 in,

    asked by amanda on September 23, 2008
  2. statistics

    the mean age at which men in the united states marry for the first time follows the normal distribution with a mean of 24.5 years. the standard deviation is 2.8 years. for a rabdom sample of 59 men, what is the likelihood that the

    asked by Vondon on April 25, 2012
  3. physics

    a race car completes 10 laps around an oval track. which of the following pairs of quantities concerning its motion would both have values of zero? a)displacement, avg velocity B)avg speed, avg acceleration c)distance, avg speed

    asked by kaaay on September 14, 2009
  4. statistics

    The following table shows the summary statistic of the cholesterol levels of two groups of men in 2014. From 25 to 40 years old, the mean is 224, standard deviation is 5.5 and the sample size is 12. From 41 to 55 years old, the

    asked by poon on November 15, 2014
  5. arithmetic mean

    the average age of 5 children is 8 years. if the age of the father is included , the average increased by 7 years. find the age of the father.

    asked by vijay on January 8, 2018
  1. Math probability

    Lottery tickets are held by 56 men and 84 women. An equal percentage of men and women are older than 55. If there are 8 men over 55, what is the probability that the lottery winner will be either man of any age or a women over 55

    asked by ER on October 11, 2015
  2. math (PLZ HELP ASAP)

    The students asked their math teacher to tell them her age. She didn’t want to tell them, but she replied, “If you take two years from my present age the result will be three times my son’s age, and seven years ago my age

    asked by Anonymous on May 14, 2016
  3. math

    A. A woman was 30 years old when her daughter was born.Her age is now 6 years more than three times her daughter's age. How old will the daughter be in 5 years? B. Lisa is 15 years old and her father is 40. How many years ago was

    asked by gary on July 13, 2013
  4. math

    average age of 20 men is 50yr.5 new men,whose average age is 40yr,join them.find average age of all men?

    asked by Anonymous on November 28, 2017
  5. Com 215

    Inclusive Language Quoting from Biased Material. Help with this sentence. Back in the 1400s, the laws govening the people were quite specific. "All men shall tithe 10% to the church and pay taxes every six months. All men can

    asked by Nesie on March 9, 2007

More Similar Questions