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The mean of three numbers is12 …

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The mean of three numbers is12 if two of the numbers are 9 and 14 find the third number

Posted by Vansh Walia Vansh Walia 4 years, 3 months ago

CBSE > Class 07 > Mathematics

1 answers

Sia ? 4 years, 3 months ago

mean= sum of all terms / no of terms
12 = 9+14+ 3rd number / 3
12*3 = 23+3rd number
36-23 = 3rd number
13 is the 3rd number

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