CPhill

From 40, we can subtract the 12 that liked neither.

This gives us 28.

So, to find the ones that like both, add the 18 that like apple pie and the 15 that like chocolate cake and subtract 28 from this.

So 18 + 15 - 28 = 5 liked both.

We have 20 ways to pick the president.

And, after he/she is chosen, 19 ways to pick the vice-president.

And then, 18 ways to pick a treasurer.

So  20 x 19 x 18 = 6840 different ways

We could also find this answer by using a permutaion  .... P(20,3)  = 6840  .... OR ....by counting sets

C(20,3) = 1140 possible sets of 3 different people.....but.....each set can be arranged in 3! = 6 ways.

So  ...  1140 x 6  =  6840

I always like this last one best......we have two tasks .... 1) pick all of the possible different sets, 2) arrange each of these in all possible ways.....

LMAO......!!!!

To find "x," we just take the square root of the the other side......so we have

√[9^2 + 7^2] =

√[81 + 49] =

√130    .....this is the hypotenuse....

....Or a bit more wine......

Sorry....I misread that one.......maybe I'm still dizzy....LOL!!!

I gave Sorasyn 3 points for a good try.....and since I'm a mod....I have the power to giveth ....or taketh away.....

OK...thanks, Melody....you know....I'm NEVER too sure about my answers to any probability question....!!!!

I beat you, Melody........!!!!!

100 pesos = $2.26

So

2.26 / 100 = x / 2,000,000      cross-multiply

x = about $45, 200    {actually, about $45, 212}