Answer:
Without outlier: 9
With outlier: 8.2
Step-by-step explanation:
Outlier is the lonely point at 1 passenger.
Mean is the average
Without outlier:
one 7
two 8
two 9
four 10
=[7+(2*8)+(2*9)+(4*10)] / 9
= (7 + 16 + 18 + 40) / 9
= 81/9
9
With outlier:
one 1
one 7
two 8
two 9
four 10
=[1+7+(2*8)+(2*9)+(4*10)] / 10
= 82/10
=8.2
