Answer:
40
Step-by-step explanation:
The frequency column gives the number of houses in the sample, then
number of houses = 5 + 11 + 23 + 1 = 40
Total miles:350+150=500
Total hours:4+3=7
Avg speed:500/7=71.429 mph
-1 is your answer, if that is what you want...
You would just subtract .1978 from 1