The table shows the number of weekly deliveries completed by each of

Question

The table shows the number of weekly deliveries completed by each of six delivery vans across three different regions. The number represents how many deliveries each van made in a typical week in that region.

Van 
 North 
 Central 
 South 
 
  A 
 12 
 14 
 10 
 
  B 
 10 
 14 
 11 
 
  C 
 12 
 15 
 10 
 
  D 
 11 
 13 
 12 
 
  E 
 12 
 14 
 10 
 
  F 
 13 
 12 
 11

Suppose a seventh van is added to the fleet and completes some number of deliveries in each region.

For each of the following regions, select  Yes  if it is possible for the mode (most frequently occurring value) of the weekly deliveries in that region to change with the inclusion of the seventh van’s data. Otherwise, select  No .

APram · Answer

Can anyone please explain why I am wrong in selecting 
North as No
South as Yes
Central as No

The current mode of north is 12 occurring 3 times, addition of any number will not change mode in north and similar for central which has current mode of 14

For south the mode may change if seventh vehicle has 11 or 10.

Kindly let me know where I am wrong

Rohit_842 · Answer

Bunuel  can you please confirm the OA.

Nikkz99 · Answer

There's only possibility of change in mode for South location and no possible change of mode can occur for remaining 2 locations.

I believe OA is incorrect.

sarthakghosh14 · Answer

catinabox

shouldnt the answer choice be inverted? for north - since there are 3 already with 12 deliveries and the rest with 1 frequency, adding one more doesnt matter be it 12 or other number same for central and south should have yes, as it can be 11 and tie with 10

catinabox · Answer

Thanks for pointing this out- the answer choices got inverted and have been corrected.

Bunuel · Answer

Solution:

North region: 
12 is the current mode (appears 3 times).
If the 7th van reports a value like 11 or 13 (which already appear once), that value could appear twice—setting up a possible mode change with future data.
Even a tie at 3 would alter the mode.
 Answer:  No

Central region: 
14 is the mode (3 times); all other values appear only once.
Adding any one new value can make another value occur at most twice, which is not enough to change the mode.
 Answer:  No

South region: 
10 is the mode (3 times); 11 appears twice.
If the 7th van reports 11, then both 10 and 11 appear 3 times, changing the mode from a single to a tie.
 Answer:  Yes

The table shows the number of weekly deliveries completed by each of

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The table shows the number of weekly deliveries completed by each of

Prep Toolkit

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