- A9.1
- B10.1
- C18.2
- D8.1
Step-by-Step Solution
Original sum = 45+0+78+45+60+45 = 273, mean = . After removing 0: sum = 273, count = 5, mean = . Increase = 54.6 - 45.5 = 9.1.
Answer: A) 9.1
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