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Three friends have a nice meal together, and the bill is $25
The three friends pay $10 each, which the waiter gives to the Cashier
The Cashier hands back $5 to the Waiter
But the Waiter can't split $5 three ways, so he gives the friends one dollar each and keeps 2 dollars as a tip.
They all paid $10 and got $1 back. $10-$1 = $9
There were three of them 3 X $9 = $27
If they paid $27 and the waiter kept $2: $27+$2=$29
Where did the other dollar go? $30 - $1 = $29
Alyssa,
The three friends each gave $10, got back $1. Each of te three spent $9.
That makes the the total amount spent as $27.
Out of this, $25 goes to the hotel, and $2 as tip to the waiter.
$27 = $25 + $2
If they paid $27 and the waiter kept $2: $27+$2=$29
Here's where the mistake lies.
$2 shouldn't be added to $27, as it is a part of the amount of $27 spent by the three friends, the remaining major part, $25, for the meals.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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