callie surveys some bus riders. she asks the riders whether they prefer a window seat or aisle seat and the…
callie surveys some bus riders. she asks the riders whether they prefer a window seat or aisle seat and the number of times they rode the bus in the past week. the two - way table shows some of the data. how many bus riders does callie survey in all? bus riders 3 or fewer rides 4 or more rides total window 20 aisle 25 40 total 30
Answer
Explanation:
Step1: Find number of aisle - 3 or fewer rides
Since total aisle riders is 40 and aisle - 4 or more rides is 25, then number of aisle - 3 or fewer rides is $40 - 25=15$.
Step2: Find number of window - 4 or more rides
Since total 4 or more rides is 30 and aisle - 4 or more rides is 25, then number of window - 4 or more rides is $30 - 25 = 5$.
Step3: Find total number of riders
Sum of all cells in the table. Total number of riders is $20+15 + 5+25=65$.
Answer:
65