Magda bought three dolls. The most expensive doll was $22.00. The least expensive doll was $15.00. What is the reasonable cost for the three dolls?

Question

I know you have to add the 22.00 and15.00 but I don't know what to do next.

Answer 1

the third doll's cost was between $15 and $22. 

 

So you can compute the maximum she would have paid, and the minimum she would have paid, and you could use the average of the cost of the first two dolls as a GUESS for the cost of the third doll, if you wanted to do that.