Question 15
**Masses (kilograms)**
| | | | | | | |
|---|---:|---:|---:|---:|---:|---:|
| Andrew | 2.4 | 2.5 | 3.6 | 3.1 | 2.5 | 2.7 |
| Maria | $x$ | 3.1 | 2.7 | 2.9 | 3.3 | 2.8 |
Andrew and Maria each collected six rocks, and the masses of the rocks were shown in the table above. The mean of the masses of the rocks Maria collected was 0.1 kilogram greater than the mean of the masses of the rocks Andrew collected. What was the value of $x$?
| | | | | | | |
|---|---:|---:|---:|---:|---:|---:|
| Andrew | 2.4 | 2.5 | 3.6 | 3.1 | 2.5 | 2.7 |
| Maria | $x$ | 3.1 | 2.7 | 2.9 | 3.3 | 2.8 |
Andrew and Maria each collected six rocks, and the masses of the rocks were shown in the table above. The mean of the masses of the rocks Maria collected was 0.1 kilogram greater than the mean of the masses of the rocks Andrew collected. What was the value of $x$?