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The mean of 7 numbers is 10. If the mean of first 4 numbers is 8 and that of last 4 numbers is 16, then the fourth number is : |
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|
(a) |
20 |
(b) |
26 |
(c) |
30 |
(d) |
36 |
|
The mean of 7 numbers is 10. If the mean of first 4 numbers is 8 and that of last 4 numbers is 16, then the fourth number is : |
|||||||
|
(a) |
20 |
(b) |
26 |
(c) |
30 |
(d) |
36 |