Answer:
To draw a two way table for the own a mini van table as it says 26 own a minivan for people with 3 or more children is subtraction from the given full total 37;
37 - 26 = 11  and  finding two or more children is 51- ?= ?  see below ans 51- 11 = 40 for those that don't own a mini van.
Then its quick addition to find 40+17 = 57
See given answers in question already easy to answer in bold before doing the sums.
               one or 2 children   |  3 or more children    Total
Do own a mini van         11           26            =    37
Do not own a mini van     40           17              =    57
Total                     51           43              =    94   Â