Maths-
SAT
Easy
Question
|
|
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 |
The correct answer is: 2.6
The mean of the masses of the rocks Andrew collected= 
The mean of the masses of the rocks Maria collected = 
Since the mean of the masses of the rocks Maria collected is 0.1 kilogram greater than the means of the masks of the rocks Andrew collected
x + 14.8 = 2.9 x 6
x + 14.8 = 17.4
x = 17.4 – 14.8
x = 
= 2.6
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