Find the geometric mean of 6 and 7. a. √42 b. 4√3 c. 7 d. 42 select the best answer from the choices provided.

First, it is important to understand the terms used in the problem.

The Arithmetic Mean:  (this is the mean we are used to seeing) 

(n= number of variables, in this case n=3)

To Find the Geometric Mean of n #'s: 

(n= number of variables, in this case n=2)

So, using this information we can find the geometric mean of 6,7 by plugging them into the equation as "a" and "b". n=2 (when n=2 a square root can be used)




So the answer in this case is A.