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The numbers 18,p,13,q,15,r,7 have a mean of 11.
The mean of p,q and r is?

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Mean is the arithmatic average of a given data set. So,


Mean= (Sum of the data)/(Number of the data)

There are seven data in the data set.

According to the given problem,


(18+p+13+q+15+r+7 )/(7) =11


(53+p+q+r )/(7) =11 Combine the like terms of the numerator.


(53+p+q+r )/(7)*7 =11 *7 Multiplying 7 to each sides of equation.

53 + p + q + r = 77

53 + p + q + r - 53 = 77 - 53 Subtract 53 from each sides.

p + q + r = 24

Next step is to divide each sides by 3 so that we can write this in form of mean of p, q and r. Therefore,


(p + q + r)/(3) =(24)/(3)

So, mean of p, q and r = 8.

I hope this helps you!.

User ScottPetit
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