anonymous
  • anonymous
See attachment
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
@Mertsj
Mertsj
  • Mertsj
how many cards in all?

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anonymous
  • anonymous
10
Mertsj
  • Mertsj
How many red?
anonymous
  • anonymous
4
Mertsj
  • Mertsj
What's the probability you will draw a red card?
anonymous
  • anonymous
4/10?
Mertsj
  • Mertsj
Reduce it.
anonymous
  • anonymous
ok 2/5
Mertsj
  • Mertsj
So you draw the red card, replace it and draw another card. What is the probability the next card you draw will be red?
anonymous
  • anonymous
well, if you draw a red card thats 4/10, then if u replace it (put it back) the chances of getting a red card don't change
Mertsj
  • Mertsj
So why don't you just say 2/5?
anonymous
  • anonymous
so the answer would be D?
Mertsj
  • Mertsj
Multiply those two probabilities.
anonymous
  • anonymous
2 /5 x 2/5 = 4/25
Mertsj
  • Mertsj
yep
anonymous
  • anonymous
tnx, i get it now.
Mertsj
  • Mertsj
yw
anonymous
  • anonymous
:)

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