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anubhavgulati
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Hi,
Data Sufficiency Question.
Set of data consists of 3 integers.What is the Standard Deviation for this set of data ?
1) Average and Median are both 3.
2) Mode is 3.
Solution) I went for answer choice E (both are not sufficient), but when I cross checked answer was C(both statements together are sufficient).
As per statement 1, Its insufficient as sets can be {1,2,3} or {3,3,3}.
As per statement 2, As mode is 3, I think for the first set {1,2,3} we can also say mode is 1,2 or 3.
but as per the answer they have considered mode as 3 only for set {3,3,3}.
Can we say mode as 3 for the set {1,2,3}. This is where I get it wrong, but I have read that if set has unique elements, we can say that every element is a mode.
Data Sufficiency Question.
Set of data consists of 3 integers.What is the Standard Deviation for this set of data ?
1) Average and Median are both 3.
2) Mode is 3.
Solution) I went for answer choice E (both are not sufficient), but when I cross checked answer was C(both statements together are sufficient).
As per statement 1, Its insufficient as sets can be {1,2,3} or {3,3,3}.
As per statement 2, As mode is 3, I think for the first set {1,2,3} we can also say mode is 1,2 or 3.
but as per the answer they have considered mode as 3 only for set {3,3,3}.
Can we say mode as 3 for the set {1,2,3}. This is where I get it wrong, but I have read that if set has unique elements, we can say that every element is a mode.
