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Calculate the value of t.
Mathematics
ScanSolve AI Answer
21.
a)
i) The value of .
Step 1: Create a table to calculate midpoints () and .
| Marks | Class Boundaries | Midpoint () | Frequency () | |
|---|---|---|---|---|
| 10-14 | 9.5-14.5 | 12 | 11 | 132 |
| 15-24 | 14.5-24.5 | 19.5 | 8 | 156 |
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