Mean of 100 items is 49. It was discovered that three items which should have been 60, 70, 80 were wrongly read as 40, 20, 50 respectively. The correct mean is (A) 48 (B) 82 (C) 50 (D) 80

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The mean of $100$ items is $49$ . It was found that three items which should have been $60, 70, 80$ , were wrongly read as $40, 20, 50$ respectively. The corrected mean is

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