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23 Nov 2025, 23:12
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
82% (01:14) correct
18%
(01:10)
wrong
based on 50
sessions
History
Date
Time
Result
Not Attempted Yet
A jumbo box of candies has 15 rows with 10 spaces for candies in each row, how many candies 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 7 rows.
(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 7 rows.
24 Nov 2025, 04:31
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Question Stem:
15 rows and 10 spaces in the box
Statement 1:
Avg 6 empty spaces for first 8 rows. Total empty spaces = 6*8
Total spaces in the first 8 rows: 10*8
Candies in first 8 rows: 10*8 - 6*8 = 4*8 = 32 candies
But we don't know anything about the remaining 7 rows
Statement 1 is not sufficient
Statement 2:
Avg 9 empty spaces for last 7 rows. Total empty spaces = 9*7
Total spaces in the last 7 rows: 10*7
Candies in last 7 rows: 10*7 - 9*7 = 1*7 = 7 candies
But we don't know anything about the first 8 rows
Statement 2 is not sufficient
Statement 1 and 2 together:
Candies in first 8 rows = 32 candies
Candies in last 7 rows = 7 candies
Candies in the box = 32 + 7 = 39
Option C Statement 1 and 2 are sufficient together
15 rows and 10 spaces in the box
Statement 1:
Avg 6 empty spaces for first 8 rows. Total empty spaces = 6*8
Total spaces in the first 8 rows: 10*8
Candies in first 8 rows: 10*8 - 6*8 = 4*8 = 32 candies
But we don't know anything about the remaining 7 rows
Statement 1 is not sufficient
Statement 2:
Avg 9 empty spaces for last 7 rows. Total empty spaces = 9*7
Total spaces in the last 7 rows: 10*7
Candies in last 7 rows: 10*7 - 9*7 = 1*7 = 7 candies
But we don't know anything about the first 8 rows
Statement 2 is not sufficient
Statement 1 and 2 together:
Candies in first 8 rows = 32 candies
Candies in last 7 rows = 7 candies
Candies in the box = 32 + 7 = 39
Option C Statement 1 and 2 are sufficient together
24 Nov 2025, 04:50
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Bunuel
There is a jumbo box of candies, with 15 rows and 10 spaces per row for candies.
So, the total number of candies that can be stored in the box = 15*10 = 150 candies.
We need to find: Number of Candies in the box.
Statement 1:
(1) There is an average (arithmetic mean) of 6 empty spaces in the first 8 rows.
In the first 8 rows, the number of empty spaces = 6*8 = 48 empty spaces.
Amongst the 80 spaces available in the initial 8 rows, 48 are empty spaces and (80-48) = 32 are filled with candies.
Since, we don’t know about the remaining 7 rows. Insufficient
Statement 2:
(2) There is an average (arithmetic mean) of 9 empty spaces in the last 7 rows.
The last 7 rows has a total of 70 slots.
63 slots = 7*9 are empty.
Filled in slots = 70 - 63 = 7 candies. We don’t have any data about the initial 8 rows. Hence, Insufficient
Combining, both statements 1 and 2, we get
The number of candies = 32+7 = 39 candies.
Hence, Sufficient
Option C
