anonymous
  • anonymous
Suppose you choose a marble from a bag containing 3 red marbles, 3 white marbles, and 5 blue marbles. You return the first marble to the bag and then choose again. Find P(red and blue).
Pre-Algebra
katieb
  • katieb
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anonymous
  • anonymous
well, what do you get when you add all the marbles?
anonymous
  • anonymous
11
anonymous
  • anonymous
okay and how many of those 11 are red or blue?

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anonymous
  • anonymous
8
anonymous
  • anonymous
so the probability of choosing a red or a blue marble would be 8/11. c:
anonymous
  • anonymous
:) thanks i have more.
anonymous
  • anonymous
okay. i'm happy to help.
anonymous
  • anonymous
You toss a coin and roll a number cube. Find P(tail and a six).
anonymous
  • anonymous
well how many sides does a coin have?
anonymous
  • anonymous
2
anonymous
  • anonymous
so the probability of getting tails is 1/2.
anonymous
  • anonymous
now for the next one. how many sides does the number cube have?
anonymous
  • anonymous
... i honestly dont know
anonymous
  • anonymous
lol, 6.
anonymous
  • anonymous
lol okay then what?
anonymous
  • anonymous
so the probability of rolling a six is 1/6
anonymous
  • anonymous
okay lol thanks here comes the next one
anonymous
  • anonymous
Anthony is making a collage for his art class by picking shapes randomly. He has five squares, two triangles, two ovals, and four circles. Find P(circle is chosen first
anonymous
  • anonymous
how many shapes do you have all together?
anonymous
  • anonymous
13
anonymous
  • anonymous
how many of those 13 are circles?
anonymous
  • anonymous
4
anonymous
  • anonymous
sooo, the probability of choosing a circle is 4/13.
anonymous
  • anonymous
you are very smart you have a instagram?
anonymous
  • anonymous
thank you.
anonymous
  • anonymous
you have a instagram?
anonymous
  • anonymous
simplify (7 – c)(–1)

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