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 1/2` (c) `50` (d) `80`A. 48B. 82.5C. 50D. 80

Mean of 100 items is 49. It was discovered that three items which shou

1.	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 1/2` (c) `50` (d) `80`A. 48B. 82.5C. 50D. 80
Answer» Correct Answer - C Sum of 100 items `=49xx100=4900` Sum of items added=60+70+80=210 New sum =4900+210-110=5000 `therefore " Correct mean" =(5000)/(100)=50`

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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 1/2` (c) `50` (d) `80`A. 48B. 82.5C. 50D. 80

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