Break the calculation for a dollar

Question

3 friend went to a coffee shop.

They ordered their coffee, had it and enjoyed their time.

Waiter came with a bill of \$30.

So they decided to pay \$10 each.

Waiter gave them \$5 in return as a discount.

Now they took \$1 each and gave \$2 as a tip to waiter.

That means coffee cost them \$9 per friend and that is 9x3=27 dollars.

And they gave \$2 to waiter which makes a total of 27+2=29 dollars.

But they initially gave a total of \$30.

Where did a dollar go?

@Xylius nope it is very different. please check the answer from Jasen. — Wasiq Shahrukh, Jun 14 '16 at 09:12
Same thing really.. Just different situation and different numbers, but I'll leave it to other people to moderate and vote — Xylius, Jun 14 '16 at 09:16

Jasen · Accepted Answer · 2016-06-14T09:12:52.987

2

They spent $25 on coffee and gave $2 to the waiter,

total cost $27 that and the three dollars change they kept makes $30

Adding the tip to the total makes no sense the tip was part of the total.

edited Jun 14 '16 at 09:12

answered Jun 14 '16 at 09:07

Jasen

exactly you have got it right – Wasiq Shahrukh Jun 14 '16 at 09:22
Or simply "That means coffee cost them $$9$ per friend" is a false statement; the coffee cost them $$\frac{25}{3}$ per friend. – Jonathan Allan Jun 14 '16 at 19:39

1 Answers1