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Numbers and Operations Videos 45 videos

SAT Math 1.3 Numbers and Operations
190 Views

SAT Math 1.3 Numbers and Operations. x and y must be which of the following?

SAT Math 2.4 Numbers and Operations
384 Views

SAT Math 2.4 Numbers and Operations

SAT Math 3.6 Numbers and Operations
208 Views

SAT Math 3.6 Numbers and Operations

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SAT Math 3.5 Numbers and Operations 174 Views


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Description:

SAT Math 3.5 Numbers and Operations

Language:
English Language

Transcript

00:03

Here’s your shmoop du jour, brought to you by pineapple.

00:06

It belongs on a pizza like your mom belongs on one of your dates.

00:10

Ethan must choose two toppings for his pizza from this selection:

00:14

pepperoni, olives, mushrooms, sausage, and pineapple.

00:19

How many different combinations of two toppings are there?

00:22

And here are the potential answers...

00:25

So Ethan has to settle on a couple of toppings for his pie.

00:28

But, he’s super-thorough, so he wants to make sure he isn’t missing any of the combos.

00:33

Let’s say he wants pepperoni.

00:35

In that case, there would be 4 combinations…pep and olive, pep and shroom, pep and sausage,

00:41

and pep and pineapple.

00:43

Okay, what about if we do the same thing for olives?

00:45

Well… still 4 combos… except we already did pep and olive, so really just three more.

00:53

Same thing happens when we get to mushrooms…

00:55

…we’ve already covered two of the possible combos involving fungi,

00:59

so there are now just 2 combos remaining.

01:02

And by the time we get to sausage…the only thing it hasn’t yet been paired with is pineapple…

01:07

and we’re done.

01:08

So as each slot gets filled, we have one fewer option to choose from…

01:12

In other words, our number of possible combinations will be four plus three plus two plus one…

01:18

…or 10. Answer C.

01:20

Ethan can finally complete his order and.... he decides to get a calzone.

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