Arithmetic mean of a given list of values

This type of question, asked 3 times: 2 Mar 2023 Tier II, 7 Mar 2023 Tier II, 18 Jan 2026 Tier II. All 3 questions below, oldest first.

Try each one first, then open its answer.

Question 1
2 Mar 2023 Tier II
28 $The arithmetic mean of the following data is _________. 23, 17,20,19,21$
Tap an option to check your answer.
Question 2
7 Mar 2023 Tier II
1 $Find the average of the following sets of numbers. 693, 456, 876, 532, 934, 691, 596, 398, 682$
Tap an option to check your answer.
Question 3
18 Jan 2026 Tier II
29 $The weekly expenditure (in dollars) of 5 families on groceries is: Family A = 250, Family B = 400, Family C = 350, Family D = 500, Family E = 300. Determine: (i) Average expenditure, (ii) Family spending above average, (iii) Difference between highest and lowest expenditure.$
Tap an option to check your answer.

Question 1