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16 Aug 2021, 04:15
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
85% (01:26) correct
15%
(02:20)
wrong
based on 75
sessions
History
Date
Time
Result
Not Attempted Yet
The average weight of 36 students is 50 Kg. It was found later that the figure of 37 Kg was misread as 73 Kg. What is the correct average?
(A) 49 Kg
(B) 50.5 Kg
(C) 51 Kg
(D) 51.5 Kg
(E) 2 Kg
(A) 49 Kg
(B) 50.5 Kg
(C) 51 Kg
(D) 51.5 Kg
(E) 2 Kg
16 Aug 2021, 05:46
Kudos
Bookmarks
Sum of the weight of 36 students = 36 * 50 = 1800 kg.
37 misread as 73 must have inflated the sum by a value of 73 -37 = 36kg
Hence the corrected sum = 1800 -36 = 1764 kg
The corrected average = 1764 / 36 = 49 kg
(option a)
D.S
GMAT SME
37 misread as 73 must have inflated the sum by a value of 73 -37 = 36kg
Hence the corrected sum = 1800 -36 = 1764 kg
The corrected average = 1764 / 36 = 49 kg
(option a)
D.S
GMAT SME
16 Aug 2021, 22:48
Kudos
Bookmarks
Sum of the ages of 36 students = 50*36 = 1800
Now let's reduce the wrong weight and add the correct weight
=> 1800-73+37 = 1764
New average age = 1764/36 = 49
OA should be A
Now let's reduce the wrong weight and add the correct weight
=> 1800-73+37 = 1764
New average age = 1764/36 = 49
OA should be A
