Question

a group of students and workers entering a metro station were asked whether they were riding the bus or the subway. the two - way table shows their answers.
types of transportation

	bus	subway	total
workers	42	70	118
total	69	97

how many people were polled?
○ 48
○ 69
○ 118
○ 166

Explanation:

Step1: Identify total polled people

To find the total number of people polled, we can either sum the total number of students and workers, or sum the total number of bus and subway riders.

Step2: Calculate total via student/worker totals

Add the total students and total workers:
$48 + 118 = 166$
Alternative Step: Calculate via bus/subway totals
Add total bus riders and total subway riders:
$69 + 97 = 166$

Answer:

D. 166