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13 Aug 2025, 22:00
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
76% (01:16) correct
24%
(01:25)
wrong
based on 85
sessions
History
Date
Time
Result
Not Attempted Yet
A box of chocolates has 15 rows with 10 spaces for chocolates in each row, how many chocolates are in the box?
(1) There is an average (arithmetic mean) of 6 empty spaces in the first 8 rows.
(2) There is an average (arithmetic mean) of 9 empty spaces in the last 9 rows.
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
(1) There is an average (arithmetic mean) of 6 empty spaces in the first 8 rows.
(2) There is an average (arithmetic mean) of 9 empty spaces in the last 9 rows.
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
13 Aug 2025, 23:33
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A box of chocolates has 15 rows with 10 spaces for chocolates in each row, how many chocolates are in the box?
(1) There is an average (arithmetic mean) of 6 empty spaces in the first 8 rows.
Insufficient
We don't know what is the case with remaining 7 rows like how many empty spaces are there. We can't assume that all remaining 7 rows are occupied.
(2) There is an average (arithmetic mean) of 9 empty spaces in the last 9 rows.
Insufficient
Similar to A, we don't know what is the case with remaining 6 rows like how many empty spaces are there. We can't assume that all remaining 6 rows are occupied.
Combining (1) and (2),
There will be an overlap as total rows are 15 only but we don't have sufficient info to know more about the overlap.
(E) is the answer
(1) There is an average (arithmetic mean) of 6 empty spaces in the first 8 rows.
Insufficient
We don't know what is the case with remaining 7 rows like how many empty spaces are there. We can't assume that all remaining 7 rows are occupied.
(2) There is an average (arithmetic mean) of 9 empty spaces in the last 9 rows.
Insufficient
Similar to A, we don't know what is the case with remaining 6 rows like how many empty spaces are there. We can't assume that all remaining 6 rows are occupied.
Combining (1) and (2),
There will be an overlap as total rows are 15 only but we don't have sufficient info to know more about the overlap.
(E) is the answer
14 Aug 2025, 20:20
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Total No of possible chocolates is 150
Option 1
average 6 empty spaces in first 8 rows , total empty rows =48
No information about rest of the rows hence (NS)
Option 2
For last 9 rows we have average 9 empty spaces , so total empty 81
Don't know about first 6 rows hence (N.S)
Both together : we see that row 7 and 8 gets overlapped in both the cases hence ,
We can't find the actual number being covered in there , Hence it is not sufficient to find out . So it should be Option E
Option 1
average 6 empty spaces in first 8 rows , total empty rows =48
No information about rest of the rows hence (NS)
Option 2
For last 9 rows we have average 9 empty spaces , so total empty 81
Don't know about first 6 rows hence (N.S)
Both together : we see that row 7 and 8 gets overlapped in both the cases hence ,
We can't find the actual number being covered in there , Hence it is not sufficient to find out . So it should be Option E
Bunuel
