...Beauty, cleaning, DIY tips and more - free to join!
   Login   Contact us   Site map   Puzzle Club   Ask a question    Newsletter

The average age of a group of 24 girl guides is 14 years. If three girls aged 15 16 and 17 leave and are replaced with other girls aged 12 what is the new average age of the group?


Question asked by: knowitall

If the average age of 24 girls is exactly 14, then you know the total age of the group: it is 24 x 14 or 336.

Therefore take off 15,16,17 from 336 and from this revised figure, add 12,12,12 (36 in total).

Then divide this new total by 24 to get the new average age, which is 13.5 exactly.

By: Unknown
star star star star
Average rating for this answer is 4 / 5

Rate Answer
Comment or provide your answer to this question
No comments have been added to this question "The average age of a group of 24 girl guides is 14 years. If three girls aged 15 16 and 17 leave and are replaced with other girls aged 12 what is the new average age of the group?".
Ask a New Question

Find out more about Maths

Maths Questions and Answers

numbers Questions and Answers

Next question: who invented pi?


Become a Member! It's Free >>>

Share on Facebook: On Twitter: TwitterTweet this!

Question Keywords

girls  aged  average  age  group  leave  girl  

More Questions:

Write The Units Digit Of The Cube Of 5922,77774,44447,125125125.
What Is 10 To The Power Of 1000
Can Anyone Give Me A Perimeter/area Questions Involving Polygons That Are Hard To Answer? (has To Be Able To Be Answered By Middle School Children Or Starters)The Question Has To Be Though And Complete With Working And Answer
Math Question
Volume In The M3 Of A Pool?