The average of 11 numbers is 48. When one number is removed, the average becomes 45. What number was removed?

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Accepted Answer

1. The total of 11 numbers is $11	imes48=528$.
2. The total of the 10 numbers left is $10	imes45=450$.
3. The removed number = $528-450=78$.
4. So the removed number is **(b) 78**.

FINAL_ANSWER: b

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