Albert and Molly design posters. In December, they each worked for 25 days and made 20 posters. Molly was on vacation in the beg
2 answers:
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Answer:
B
Step-by-step explanation:
The screenshot given explains the formula of standard deviation, which measures the variation of numbers in a set.
It basically says we have to find the sum of all the numbers subtracted by the mean squared, and divide that by the number of data sets, and then square root.
The only way we can get this problem is by B.
