Another $2.79 Mathematics Experience
As mentioned last week, my wife buys me greeting cards...not for an occasion, but because they involve "mistakenmathematics" in some form. Consider this second example...
The cover shows a monkey making a face at you, with the phrase: "78% of the people think you look like a monkey. 32% of the people think you smell like one, too."
And inside: "You do the math. Happy Birthday"
Think about the mathematics involved....with these additional thoughts:
 The obvious element is the fact that the two percents add to a total that exceeds 100%, but so what, as there could be an overlap as in Venn Diagrams?
 Is the author of the card even aware that there is no "necessary" contradiction? That is, did they "do the math" themselves but not understand it?
 So, as a worst case, it could be that 78% of the people think one looks like a monkey, while 32% of the people think you both look like and smell like one....or maybe that is not the worst case, as it could be that 68% of the people think one looks like a monkey but does not smell like one, 10% of the people think you both look like and smell like a monkey, and the remaining 22% think you smell like a monkey but do not look like one.
 And finally, the most perplexing thing, what does this whole issue have to do with someone having a birthday? I am missing any connection....[See * below for further explanation]
Wow...Again, all of this mathematical discussion prompted by $2.79 card (less 10% sale reduction plus state tax = ?)...enough fun, and I doubt I will give anyone this card!
*A.K. (Mount Vernon) has provided the link I was unaware of. She writes: "A variation of the happy birthday song (usually sung after singing the normal version first) is:
Happy birthday to you
Happy birthday to you
You look like a monkey
And you smell like one too!
