mathmath333
  • mathmath333
Probability question
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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mathmath333
  • mathmath333
\(\large \color{black}{\begin{align} & \normalsize \text{10 black and 5 white balls. Two balls are drawn from the}\hspace{.33em}\\~\\ & \normalsize \text{urn one after the other without replacement. What is the}\hspace{.33em}\\~\\ & \normalsize \text{ probability that both drawn balls are black? }\hspace{.33em}\\~\\ \end{align}}\)
misty1212
  • misty1212
HI!!
misty1212
  • misty1212
what is the probability that the first one is black?

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More answers

mathmath333
  • mathmath333
robability that the first one is black=2/3
mathmath333
  • mathmath333
hii!
misty1212
  • misty1212
ok now how many black balls are left in the urn?
mathmath333
  • mathmath333
9
misty1212
  • misty1212
right and how many balls total?
mathmath333
  • mathmath333
14
misty1212
  • misty1212
so therefore the probability that the second ball chosen is black, given that the first ball was black, is ?
mathmath333
  • mathmath333
9/14
misty1212
  • misty1212
exactly
misty1212
  • misty1212
your final job is \[\frac{2}{3}\times \frac{9}{14}\]
mathmath333
  • mathmath333
3/7
misty1212
  • misty1212
ok looks good

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