If the number of items sold by C on Thursday is the average of the number of…
2024
If the number of items sold by C on Thursday is the average of the number of items sold by C on Wednesday and Friday, then the total number of items sold by C on all the five days is:
Answer: B. 3800 — ConceptAn average represents an equal-share value: for two quantities a and b, their average is (a + b) / 2. A total across several days is found by adding…
- A.
3500
- B.
3800
- C.
3400
- D.
3700
Show answer & explanation
Correct answer: B
Concept
An average represents an equal-share value: for two quantities a and b, their average is (a + b) / 2.
A total across several days is found by adding each day’s value exactly once, including any missing value first derived from the given condition.
Application
For C, Wednesday’s value is 820 and Friday’s value is 700.
Thursday’s value = (820 + 700) / 2 = 1520 / 2 = 760.
Five-day total = 480 + 1040 + 820 + 760 + 700 = 3800.
Cross-check
The five-day mean is 3800 / 5 = 760. The values below and above 760 balance each other, confirming the total.
Therefore, C sold 3800 items over the five days.