anonymous
  • anonymous
There are 9 boys & 15 girls in a class. Three children are chosen at random . what is the probability that (a) one is a boy and two are girls???
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
i am not sure but i think: 2/135
anonymous
  • anonymous
its 945/2024
anonymous
  • anonymous
yes@uditkulka is right

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anonymous
  • anonymous
yes i know i am right but what is the sollution i mean explanation can u give me please????
anonymous
  • anonymous
ya
anonymous
  • anonymous
see 15+9=24 total =24C3=2024
anonymous
  • anonymous
and 9C1*15C2=945
anonymous
  • anonymous
understood
anonymous
  • anonymous
9/15 = 3/5.....thefore probability is 3/8 of being a boy and 5/8 of being a girl
anonymous
  • anonymous
whats c1 and C2
anonymous
  • anonymous
?
anonymous
  • anonymous
9*1/1*15*14/2=945
anonymous
  • anonymous
combinations ncr formula
anonymous
  • anonymous
thanks
anonymous
  • anonymous
yw

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