What is the arithmetic mean of 23, 34, 65, 78, 27 and 90 (correct to one decimal place)?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 52.8
The arithmetic mean is the sum of the values divided by the number of values.
Sum \(=23+34+65+78+27+90=317\)
Number of values \(=6\)
Mean \(\displaystyle=\frac{317}{6}=52.83...\)
Correct to one decimal place: 52.8
The arithmetic mean is 52.8.