anonymous
  • anonymous
A bag has 1 red marble, 4 blue marbles, and 3 green marbles. Peter draws a marble randomly from the bag, replaces it, and then draws another marble randomly. What is the probability of drawing 2 blue marbles in a row? Explain your answer.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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misty1212
  • misty1212
HI!!
misty1212
  • misty1212
you got a clue or you want to go real slow?
anonymous
  • anonymous
hi again lol

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More answers

anonymous
  • anonymous
I kinda have a clue but im not sure
misty1212
  • misty1212
ok so lets take it step by step how many marbles are in the bag total?
anonymous
  • anonymous
8
misty1212
  • misty1212
ok and how many are blue?
anonymous
  • anonymous
4
misty1212
  • misty1212
ok good, so what is the probability that the first one selected is blue?
anonymous
  • anonymous
ummm
anonymous
  • anonymous
4/8?
misty1212
  • misty1212
make a guess, if you are wrong i will tell you
misty1212
  • misty1212
yeah \[\frac{4}{8}\] except that you really want to say \(\frac{1}{2}\) same thing
anonymous
  • anonymous
oh ok
misty1212
  • misty1212
now you put the marble back (it says that) so you still have 4 blue marbles in the bag and 8 total
anonymous
  • anonymous
oh so it would be 1/2 again?
misty1212
  • misty1212
yes and for them both to happen, blue and then blue again, the probability is the product of those two
misty1212
  • misty1212
i.e. \[\frac{1}{2}\times \frac{1}{2}\]
misty1212
  • misty1212
hope that is more or less clear
anonymous
  • anonymous
Yeah makes sense
misty1212
  • misty1212
k good

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