A student investigated how sediment size changes along a beach. They measured the length of ten pebbles at each site using a ruler. The median pebble length (in millimetres) at each site is shown in the table below.
Site | Location on beach | Median pebble length (mm) |
|---|---|---|
1 | Western end | 68 |
2 | 57 | |
3 | 49 | |
4 | 61 | |
5 | 38 | |
6 | Eastern end | 27 |
Calculate the median of the six site medians shown in the table. Show your working.
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