it shld be D.
1.clear
2. Avg = sum/no of ppl/
both are given
so IMO D but wrong
prep3
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krazy800,
If 2 is not sufficient, then on the same grounds, I would argue 1 is not sufficient either. coz we dont know n. But since the question itself asks us to find avg of n ppl, 2 is sufficient. Otherwise, I dont know what differentiates 1 from 2.
1 is an avg of avgs vs 2 a simple avg.
Pls explain why you said that 2 is insufficient.
thanks
-V
If 2 is not sufficient, then on the same grounds, I would argue 1 is not sufficient either. coz we dont know n. But since the question itself asks us to find avg of n ppl, 2 is sufficient. Otherwise, I dont know what differentiates 1 from 2.
1 is an avg of avgs vs 2 a simple avg.
Pls explain why you said that 2 is insufficient.
thanks
-V
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I agree with Vital.....Avg = sum/no. of people.vittalgmat wrote:krazy800,
If 2 is not sufficient, then on the same grounds, I would argue 1 is not sufficient either. coz we dont know n. But since the question itself asks us to find avg of n ppl, 2 is sufficient. Otherwise, I dont know what differentiates 1 from 2.
1 is an avg of avgs vs 2 a simple avg.
Pls explain why you said that 2 is insufficient.
thanks
-V
Sum of height is given and no. of people = n. So, we can find out.
IMO D
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Vittal,
in statement 1: 'n' in both numerator and denominator..so n cancels out
Statement 2 .. i agree we know the sum of heights but the no of people n is still a variable so we cannot get a definitive answer (Average). therefore insufficient..
I still go with A..
Guyz any thoughts abt this problem is greatly appreciated!
in statement 1: 'n' in both numerator and denominator..so n cancels out
Statement 2 .. i agree we know the sum of heights but the no of people n is still a variable so we cannot get a definitive answer (Average). therefore insufficient..
I still go with A..
Guyz any thoughts abt this problem is greatly appreciated!
Aiming High
Its certainly A
A
the n will cancel
n/3 ppl have height x
2n/3 ppl have height y
so we can easily find average
B
total height is given but no of ppl are not given
so we can not solve
Difference between A and B
In A, we can find total height of n ppl in terms of n
so n and n can cancel
but in B
we have total height as a number
and the n of denom can not cancel.
Let me know if you need more detailed explanation!!
A
the n will cancel
n/3 ppl have height x
2n/3 ppl have height y
so we can easily find average
B
total height is given but no of ppl are not given
so we can not solve
Difference between A and B
In A, we can find total height of n ppl in terms of n
so n and n can cancel
but in B
we have total height as a number
and the n of denom can not cancel.
Let me know if you need more detailed explanation!!