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What is the probability of getting exactly 5 boys and 5 girls if you have 10 kids?
Wiki User
∙ 14y ago
Here the sample space is(s)=10, =>mod(s)=10
a=be the event of getting exactly 5 boys =>mod(a)=5
b=be the event of getting exactly 5 girls =>mod(b)=5
thus,
p(a)=mod(a)/mod(s)=5/10=1/2
p(b)=mod(b)/mod(s)=5/10=1/2
p(5 boys and 5 girls)=p(a)*p(b)=1/2*1/2=1/4
Wiki User
∙ 14y ago
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What is the difference between a probability and a fraction?
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The probability that a family with 3 children has 3 girls assuming that having boys and girls are equally likely?
50%
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What is the probability that out of 250 babies born 140 or fewer will be boys?
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What is the difference between a probability and a fraction?
The probability is always a fraction except when it is 0 or 1. If a probability = 1 then it will definitely happen. If the probability is 0 then it will not happen. If you toss a fair coin the probability of heads is 1/2, and the probability of tails is 1/2. These fractions are representations of the probabilities. Not all fractions are representative of probabilities. Fractions can be used to represent a portion of a whole. Like what portion of a class is boys, and what portion is girls: If there are 8 boys and 7 girls, then the 8/15 of the class is boys, and 7/15 of the class is girls.
What is the probability of having exactly 2 boys out of 6 children?
The answer depends on whether the children are picked at random. If they were selected from inside a girls' school the probability should be quite close to 0. Likewise, if the children were picked inside a boys' school. If six children are picked at random from a large group of children with an equal number of boys and girls, then the answer is 6C2*(1/2)6 = 15/32 = 0.47, approx.
The probability that a family with 3 children has 3 girls assuming that having boys and girls are equally likely?
50%
