Question

The table below summarizes the amount of milk consumed by a sample of 27 families last month.Number of families Number of gallonsper familyFor these families, what is the mean number of gallons of milk consumed? Round your answer to the nearest tenth.gallons

Answer 1

There are 7 families with 1 gallon, 10 with 4 gallons and 10 with 5 gallons, so:

$mean=\frac{7\cdot1+10\cdot4+10\cdot5}{27}$$mean=\frac{7+40+50}{27}$$mean=\frac{97}{27}\approx3.6\text{ gallons/family}$