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12 Jan 2015, 11:07
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B
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:
66% (00:57) correct
34%
(00:57)
wrong
based on 191
sessions
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If X is a set of four numbers, a, b, c, and d, is the range of the numbers in X greater than 4?
(1) a is the greatest number in X
(2) a – d > 4
Kudos for a correct solution.
(1) a is the greatest number in X
(2) a – d > 4
Kudos for a correct solution.
12 Jan 2015, 23:20
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here we go.
St1: a is the greatest number in X
Clearly Insufficient
St2: a – d > 4
No information is given about b and c
Clearly Insufficient
Combining -
a is the greatest number in X, and a – d > 4 ---> a > d+4
If d is the minimum value in X, avg has to be greater than 4 (already given)
And If b or c has the minimum value (a being the greatest), b/c will be less than d (in that case) -> and that will automatically give Range greater than 4.
According to me Option C is the correct answer
St1: a is the greatest number in X
Clearly Insufficient
St2: a – d > 4
No information is given about b and c
Clearly Insufficient
Combining -
a is the greatest number in X, and a – d > 4 ---> a > d+4
If d is the minimum value in X, avg has to be greater than 4 (already given)
And If b or c has the minimum value (a being the greatest), b/c will be less than d (in that case) -> and that will automatically give Range greater than 4.
According to me Option C is the correct answer
12 Jan 2015, 23:31
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Statement 1: In deed clearly insufficient as we are given no information about the difference off the numbers.
Statement 2: Sufficient. Even if a is not the largest number our be is not the smallest, there difference is larger than 4, so the range of the entire set cannot be smaller than 4. If the other two numbers are further apart, that only increases the range.
Answer B.
Statement 2: Sufficient. Even if a is not the largest number our be is not the smallest, there difference is larger than 4, so the range of the entire set cannot be smaller than 4. If the other two numbers are further apart, that only increases the range.
Answer B.
