ritula wrote:

Pls explain ur answer

1 only

Total - 15

Average - 150K

median 130K

Median = 130K So for understanding we will divide the number 15 as

first 7 ---- 8 ---- last 7

8th house is 130K(since median)

to get the max. price of last 7 houses, letz take the price of first 7 house as 130K.

So total Sum = 15*150K

Sum of first 8 houses = 8*130K

So total - sum of first 8 = sum of last 7 and average will give avg. price if last 8

2250K - 1040K = 1210K/7 ~ 173.9K

which means aleast 1 house will cost more than 165K.

2) Atleast 1 house is sold b/w 130k and 150k,

well, certainly we can say that. But may or may not be.

from above explanation.. it can be said all last 7 houses can cost ~ 173.9K

3) atleast one house is sold for <130K

well, certainly we can say that. But may or may not be.

from above explanation.. it can be said all first 7 houses can cost 130K

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired. If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links:

Quantitative |

Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.