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There are 20 students in a class. The mean value of their scores is 135. On rechecking, two mistakes were found. After correction, the marks of one student was increased by 35 and the marks of the other was decreased by 15. What is the mean value of the marks after correction? |
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(a) |
135.5 |
(b) |
136 |
(c) |
155 |
(d) |
134.5 |
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There are 20 students in a class. The mean value of their scores is 135. On rechecking, two mistakes were found. After correction, the marks of one student was increased by 35 and the marks of the other was decreased by 15. What is the mean value of the marks after correction? |
|||||||
|
(a) |
135.5 |
(b) |
136 |
(c) |
155 |
(d) |
134.5 |