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the answer is 7

Step-by-step explanation:

Two steps

1. subtract the mean from each of the values and get the absolute values:

149 - 161 = -12, |-12| = 12. Do this to each value, and you will get 12, 8, 2, 5, 6 and 9.

2. Then add the values up and you will get 12 + 8 + 2 + 5 + 6 + 9 = 42

Then divide 42 by the number of values (essentially getting the mean of these numbers) so 42/6 = 7.

Thus, the final answer is 7.

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.