SOLUTION: my word problem is : The mean weight of 12 boulders is 25 pounds. adding another boulder increases the mean to 29 pounds. What is the weight of the 13th boulder?

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Question 795287: my word problem is :
The mean weight of 12 boulders is 25 pounds. adding another boulder increases the mean to 29 pounds. What is the weight of the 13th boulder?
Found 2 solutions by Cromlix, stanbon:
Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website!
The mean weight of 12 boulders is 25 pounds.
The total weight of 12 boulders = 12*25= 300 pounds.
Adding another boulder increases the mean to 29 pounds.
The total weight of 13 boulders = 13*29 = 377 pounds
377 - 300 = 77 pounds
This is the weight of the thirteenth boulder.
Hope this helps.
:-)

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
my word problem is :
The mean weight of 12 boulders is 25 pounds. adding another boulder increases the mean to 29 pounds. What is the weight of the 13th boulder?
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weight of the 12 = 12*25 = 300 lbs
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weight of the 13 = 13*29 = 377 lbs
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Ans: weight of the 13th = 77 lbs
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Cheers,
Stan H.
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