|
Mean of 35 observations is 75. The mean of first 18 observations is 70 and the mean of last 18 observations is 80. Find the 18th observation. |
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|
(a) |
80 |
(b) |
70 |
(c) |
68 |
(d) |
75 |
|
Mean of 35 observations is 75. The mean of first 18 observations is 70 and the mean of last 18 observations is 80. Find the 18th observation. |
|||||||
|
(a) |
80 |
(b) |
70 |
(c) |
68 |
(d) |
75 |