Answer:
5.81%
Step-by-step explanation:
To find the mean add up all the numbers and divide. The mean absolute deviation is the difference.
Answer:
B. 1/2
Step-by-step explanation:

If we plug in 0 for z, we get 0/0. Apply l'Hopital's rule.

Now when we plug in 0 for z, we get:

5 rows of 10 photos and last row with 3 photos,
6 rows of 8 photos and last row with 5 photos,
7 rows of 7 photos and last row with 4 photos,
Also, reverse the rows and photos in each row (ex 5 rows 10 photos=10 rows 5 photos) to get another 3 sets.
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Step-by-step explanation:
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