Answer:
19 people
Step-by-step explanation:
To find how many people went to the mall, count each x
At 0 trips, there are 2 xs, so 2 people had 0 trips to the mall
At 1 trip, there are 0 xs, so 0 people had 1 trip to the mall
At 2 trips, there are 10 xs, so 10 people had 2 trips to the mall
At 3 trips, there are 7 xs, so 7 people had 3 trips to the mall
Add up all the xs
2+0+10+7=19
19 people in all
