What Is Wrong With This Sign?

You can simply see that since $5$ chicken wings cost $\$3$ , then $10$ chicken wings should cost about $\$(3\times 2)=\boxed{\$6}$ .

But, here in the price board, it shows that the price for $10$ wings is $\$8.99$ which is way higher than the price the wings should cost. So, the problem with the price board is The price for 10 wings is way too expensive.

P.S - I don't think that finding price of $1$ chicken wing and then comparing prices using unitary method is really necessary here as you can find the just avg. price of the $10$ wings by multiplying the price of $5$ wings from the board by $2$ . I however ain't saying that solution is incorrect..I just think it's unnecessary..

Okay... weird problem. Anyways, first find how much everything is per wing. Let's set up some proportions: $\frac{5}{3}=\frac{3}{2}$ when we solve for the 5 wings versus 3 wings. Cross multiplying, $10=9$ . So those two are just about the same price per wing. Let's try the 10 wing deal. $\frac{10}{9}=\frac{5}{3}$ . Cross multiplying, we produce $30=45$ which is seriously off. Thus, the 10 piece wings are too expensive.

While it's not good math...it is good marketing...People all to often assume that the sellers have their best interests at heart, and they will give you a discount for buying more...not always the case (actually I'm finding it's rarely the case anymore)... At the grocery store, lately, it has behooved me to purchase two smaller items, because it's cheaper than buying the "bargain" size! They are banking on your assumptions to make them some cash! Yet another reason, as I always tell my kids, you MUST know math!

5 is cheapest, but There is NOTHING WRONG with this pricing. This is INDUCED Marketing Technic. You came to buy 5 pieces only. But looking at the price structure, you are tempted to buy TWO piece deals. You though guys at McDonald are crazy and don't know maths. But in fact they forced you to buy an 'extra' 5 piece deal while you only needed 1 deal. You are thinking that you are outsmarting McDonald, while in fact they are outsmarting you and making good sales on that day. :)

I wonder where Arron took this photo.Look at the contrast of the $3, it seems to have been Photoshopped.

This problem can be solved by method of linear equations.

First of all, lets find the cost of 1 chicken wing (Since 3*x=$1.99) where x=cost of 1 chicken wing, Then, x=1.99/3, x=$0.66

Let us check this value for 3 x=$1.99 Hence, for 3 x=$1.99, 3*(0.66)=$1.98,~$1.99 which is approximately correct.

Hence, for 5 x=$3.0, 5 (0.6)=$3.0, which is correct

But, for 10 x=$8.99, 10 (0.6)=$6.0, which is less than the amount $8.99 given in the problem Hence, the ten piece wings are too expensive.

If 5 chicken wings cost $3,10 chicken wings cost [(3/5)*10]=$6. The price on the board for the 10 pieces was $8.99,which is $2.99 more than the actual price.Which is why,the price for 10 chicken wings according to the board,is the mistake.

$1,99 / 3 = 0,66333... If you multiply by 10, will be $6,6333... So, the price for 10 is very expensive.

Calculate the price of a single unit, it is cheapest for 5 pieces @ $3 deal ($ 0.6 per unit). 10 pieces @ $8.99 is the costliest ($ 0.899 per unit).

It's a general understanding that if the number of pieces of wings increases the price also increases but not in equal amount. Here cost of 3 wings is 1.99$ and cost of 5 wings is 3.00$ . Hence cost of 10 wings must be less than (2 * cost of 5 wings) . Therefore cost of 10 wings cannot be 8.99$ and it can be around 5$.

The ten piece wings are too expensive three piece 1.99$ Means ten piece 6.6$^ but ten piece 10 $

https://imgur.com/WwHccHx

Compare the prices of 3 chicken wings in both pictures. Click on the link above

cost of 1 wing=1.99/3=0.6633

cost of 5 wings=0.6633*5=3.3165(given cost=3.00)

Cost of 10 wings=0.6633*10=6.633 (given cost=8.99),

We can see that cost of 10 wings is most expensive in compare to others