Find the mean of 12, 15, 7, 8 and ‘\(x+13\)’, if \(x=2\)
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 11.4
The mean is the sum of the values divided by the number of values. The fifth value is found first from \(x=2\).
Fifth value \(=x+13=2+13=15\)
Sum \(=12+15+7+8+15=57\)
Mean \(\displaystyle =\frac{57}{5}=11.4\)