Question

The table given below shows the data for the time taken by a person to go to a school for 5 days of a week:

Day	Time taken (in min)
Monday	25
Tuesday	20
Wednesday	30
Thursday	35
Friday	40

The time taken on Friday is how much more than the average time taken by the person?

• A.
  20
• B.
  10
• C.
  25
• D.
  15

Answer 1

The correct option is B

10
We know,

Average = $\frac{Sumofallobservations}{Totalnumberofobservations}$

Here,
Sum of all observations = 20 + 25 + 30 + 35 + 40 = 150
Number of observations = 5

$\therefore$ Average = $\frac{150}{5}=30$

Time taken on Friday = 40 min

$\therefore$ It is 40 -30 = 10 min more than the average.