I got this exam in the question, could i get assistance with the working please.

ECHO is loaded at gross weight 2862kg IU 682 and full fuel in the mains.
6 x 25kg packets in the rear. They want to add 2 pax to Row 3 @77KG each.

How many packets would need to be removed:

Packets to remove:
one
none
two
six

Remember that the aircraft must be within limits at zero fuel weight AND at take-off. Try putting the two extra passengers in and then taking the fuel out of the main tanks and check the c of g at zero fuel weight. You may find that it is within limits with the fuel in but out of the aft limit with no fuel on board.

Thanks Bob.

I did this actually and when I add pax the weight comes to 3016kg and IU 748.22
(which is outside the forward limit and over MTOW) FWD limit: 2577mm

Then I took the fuel out ZFW - 2744kg and 699.8 IU and it's within the envelope. FWD limit 2504mm


The difference between 3016kg and 2950kg is 66kg above MTOW - do I divide this by 25kg = 2..64 - 2 packets?

Question is faulty or you recalled the detail incorrectly.
Start load is forward of forward limit. (2383 vs 2536)
A forward limit problem so removing aft baggage is only going to worsen the problem. Forget that.
Add the two pax and reduce fuel to achieve MTOW and see where that leaves you. (2497 vs 2560). Still too far forward.
Continue reducing fuel to achieve the forward limit (around 85kg fuel at 2527).

My guess is that the nominated IU is incorrect and way too far forward.

(edit to correct answer error)