Answer:
b. 1.50(150%)
Explanation:
Given that, the standard time per packages is 10 minutes
Then, the total time taken in eight hour shift is 8 * 60 = 480 minutes
The standard output = Total time taken / Standard time = 480/10 = 48 packages
Therefore, the efficiency of Kaitlyn = Kaitlyn's Output / Standard output
=72 / 48
= 1.5
Hence, the answer is 150% or 1.5