The line graph shows the temperature (in °C) at noon in a city on the seven days of a week.
On how many days of the week was the noon temperature higher than the average noon temperature of the week?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 3
First the average of the seven readings is found; then each day is compared with it. A day equal to the average is not higher than it.
Readings: 31, 33, 30, 34, 36, 35, 32
Total \(=31+33+30+34+36+35+32=231\)
Average \(\displaystyle =\frac{231}{7}=33^\circ\)C
Higher than \(33^\circ\)C: Thursday (34), Friday (36), Saturday (35)
Tuesday (33) equals the average, so it is not counted
The noon temperature was above the average on 3 days.