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 Slippery Supplier (Posted on 2013-11-12)
A grocer has six suppliers with each supplier selling a different brand of tea in 4-ounce packets at \$ 20 per packet. The grocer knows that one of the suppliers gives short weight, each packet of his brand weighing only 3.75 ounces.

Using a digital scale with only one weighing, what is the minimum amount the grocer must spend to be sure of finding the supplier who gives short weight?

 See The Solution Submitted by K Sengupta No Rating

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 answer - spoiler | Comment 1 of 6
He should buy 6 packets , 1 from supplier A, 2 from supplier  B
and 3 from  supplier  C.

If the total weight is 24 oz, then D is the cheater,
If the total weight is 23.75  oz, then  A is the cheater,
If the total weight is 23.50 oz, then B  is the cheater,
If 23.25 oz, then C.

Total cost: 120\$

 Posted by Ady TZIDON on 2013-11-12 11:02:44

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