is3535
  • is3535
A bag contains 3 red marbles, 5 yellow marbles, and 4 blue marbles. One marble is chosen at random. What is the probability that the chosen marble will be blue?
Mathematics
chestercat
  • chestercat
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is3535
  • is3535
Vocaloid
  • Vocaloid
how many blue marbles are there? how many total marbles are there?
is3535
  • is3535
4 11

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More answers

is3535
  • is3535
4 blue and 4+5+3=11
is3535
  • is3535
Vocaloid
  • Vocaloid
yes! so, what is the probability of getting blue?
is3535
  • is3535
4 time
Vocaloid
  • Vocaloid
not quite! think of it this way: probability of getting blue = number of blue/number of total marbles
is3535
  • is3535
11
is3535
  • is3535
is3535
  • is3535
help
Vocaloid
  • Vocaloid
number blue marbles = ? number of total marbles = ? number of blue marbles/number of total marbles = ?
is3535
  • is3535
4 blue and 11
Vocaloid
  • Vocaloid
right! so what is the number of blue marbles/the number of total marbles?
is3535
  • is3535
4/11
Vocaloid
  • Vocaloid
yeah
is3535
  • is3535
so that my answer
Vocaloid
  • Vocaloid
yes
is3535
  • is3535
|dw:1432839463131:dw|
is3535
  • is3535
|dw:1432839500961:dw|
is3535
  • is3535
is3535
  • is3535
Vocaloid
  • Vocaloid
oh, I'm sorry, you made a mistake earlier! how many total marbles are there? your original answer was wrong and I didn't see it what is 3 + 5 + 4? it's not 11
is3535
  • is3535
@Vocaloid now what 12
is3535
  • is3535
12
is3535
  • is3535
1/12
is3535
  • is3535
|dw:1432839664784:dw|
Vocaloid
  • Vocaloid
ok! now try the probability again how many blue marbles are there? how many total marbles are there? what is the probability of getting a blue marble?
Vocaloid
  • Vocaloid
I'm sorry, I didn't catch your mistake earlier
is3535
  • is3535
45+4 +3 = 12 4 blue
is3535
  • is3535
it will be 1/12
Vocaloid
  • Vocaloid
please try again probability of getting a blue marble = number of blue marbles/number of total marbles
is3535
  • is3535
4/12
is3535
  • is3535
4/1
is3535
  • is3535
1/4
is3535
  • is3535
Vocaloid
  • Vocaloid
please try again: 1. how many blue marbles are there? 2. how many total marbles are there? what is the number of blue marbles DIVIDED by the number of total marbles?
Vocaloid
  • Vocaloid
|dw:1432839886465:dw|
is3535
  • is3535
4 divided 11= 3
is3535
  • is3535
1/3 is my answer
Vocaloid
  • Vocaloid
yes! 4/12 = 1/3 you're done
is3535
  • is3535
ty

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