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11 Jul 2024, 11:19
Kudos
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
50% (01:12) correct
50% (01:38) wrong based on 2 sessions
History
Date
Time
Result
Not Attempted Yet
In a quality-control test, 50 boxes—each containing 30 machine parts—were examined for defective parts. The number of defective parts was recorded for each box, and the average (arithmetic mean) of the 50 recorded numbers of defective parts per box was 1.12. Only one error was made in recording the 50 numbers: “1” defective part in a certain box was incorrectly recorded as “10”.
Quantity A
The actual average number of defective parts per box
Quantity B
0.94
Quantity A
The actual average number of defective parts per box
Quantity B
0.94
11 Feb 2025, 08:39
Kudos
Bookmarks
pkm9995
Explanation
Total errors (incorrectly recorded): 50*1.12 = 56 (This is incorrect value)
Actual average = 56-9 (As 10 was recorded instead of 1) = 47 = 47/50 = 0.94
Hence, both quantities are equal.
Answer: C
