What was the combined number of flyers per hour printed by both employees over the two days combined?

To find the combined number of flyers per hour, first calculate the total number of flyers printed and the total number of hours worked. Then, divide the total flyers by the total hours.

1. Calculate the total flyers printed:

Total flyers = 180 (Maria, Mon) + 380 (Maria, Tue) + 140 (David, Mon) + 280 (David, Tue) = 980 flyers.

2. Calculate the total hours worked:

On Monday, 2 employees worked for 4 hours each: 2 · 4 = 8 hours.

On Tuesday, 2 employees worked for 6 hours each: 2 · 6 = 12 hours.

Total combined hours = 8 + 12 = 20 hours.

3. Calculate the combined rate:

Rate = Total flyers / Total hours = 980 / 20 = 49 flyers per hour.

The correct answer is 49.

A is incorrect because it is the unweighted average of the separate daily rates. The combined rate on Monday was (180+140)/(4+4) = 40 flyers/hour. The combined rate on Tuesday was (380+280)/(6+6) = 55 flyers/hour. The average of 40 and 55 is (40+55)/2 = 47.5. This is incorrect because it doesn't account for the different number of hours worked each day.

C is incorrect because it results from dividing the total flyers (980) by the total hours one person worked (4+6=10), instead of the total hours both people worked (20).

D is incorrect because it is the total number of flyers (980) divided by the 4 entries in the table, which is not a meaningful rate.