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Mathematics 8 Online
OpenStudy (anonymous):

A bag contains 3 red marbles, 5 blue marbles, 2 yellow marbles, and 2 lavender marbles. How many possible sets of three marbles are there?

OpenStudy (anonymous):

n choose r, where n is the total number of objects and r is the number of objects chosen out of n. So in you case (12 choose 3). Grab a calculator to evaluate

OpenStudy (anonymous):

230?

OpenStudy (anonymous):

@sourwing

OpenStudy (anonymous):

it's 220

OpenStudy (anonymous):

I would assume you had a typo

OpenStudy (anonymous):

oh yes 220 my bad so you add all together?

OpenStudy (anonymous):

@sourwing can you further explain?

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