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

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

There are seven data in the data set.

According to the given problem,

Combine the like terms of the numerator.

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,

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

I hope this helps you!.

a = 15

Step-by-step explanation:

=>8a+2a+a+15=180

=>11a+15=180

=>11a=180-15

=>11a=165

=>a=165/11

=>a=15