anonymous
  • anonymous
A family has 2 children. It is equally likely there are 2 boys, 2 girls, or 1 boy and 1 girl.Which of the following statements is NOT true? A. The probability there are 2 boys is 33 %. B. The probability there is 1 boy and 1 girl is 50%. C. The probability there is 1 boy and 1 girl is the same as the probability there are 2 girls. D. The probability for each of the three possibilities is 33 %.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
can anyone help
anonymous
  • anonymous
I think this question confuses a lot of people because there's a lack of intuitive context -- I'll try to supply that. Suppose there is a birthday party to which all of the girls (and none of the boys) in a small town are invited. If you run into a mother who has dropped off a kid at this birthday party and who has two children, the chance that she has two girls is 1/3. Why? 3/4 of the mothers with two children will have a daughter at the birthday party, the ones with two girls (1/4 of the total mothers with two children) and the ones with one girl and one boy (1/2 of the total mothers with two children). Out of these 3/4 of the mothers, 1/3 have two girls. On the other hand, if the birthday party is only for fifth-grade girls, you get a different answer. Assuming there are no siblings who are both in the fifth grade, the answer in this case is 1/2. The child in fifth grade is a girl, but the other child has probability 1/2 of being a girl. Situations of this kind arise in real life much more commonly than situations of the other kind, so the answer of 1/3 is quite nonintuitive.
anonymous
  • anonymous
so its not C

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More answers

anonymous
  • anonymous
its a or d
anonymous
  • anonymous
it's b i think
anonymous
  • anonymous
no pls read the ques @yukselcia
anonymous
  • anonymous
remeber NOT
anonymous
  • anonymous
imma take a wild guess on a or d
anonymous
  • anonymous
a or d
anonymous
  • anonymous
i think B is the correct answer
anonymous
  • anonymous
no a or d
anonymous
  • anonymous
I think the question is backwards... B is the only TRUE statement
anonymous
  • anonymous
There are 3 possible outcomes i.e 2 boys, 2 girls, and (1 boy and 1 girl) The probability there is 1 boy and 1 girl = 1/3 = 33 % So B is not true
anonymous
  • anonymous
yes, given the false assumption of P(1/3), the answer has to be B
anonymous
  • anonymous
the answer was B i check after i got it wrong
anonymous
  • anonymous
come on guys give me medals
anonymous
  • anonymous
i think its B now look "Probability" meaning not sure.. but we see it 100% sure =)
anonymous
  • anonymous
stephinne is right!!!!!
anonymous
  • anonymous
AND the answer is B idol stephanie!!! jersey "74" hahahaha
anonymous
  • anonymous
the answer is B
anonymous
  • anonymous
ya

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