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What is the probability when two people alternately are picking first from a class with 12 girls and 13 boys and then from a class with 10 boys and 11 girls that the first will pick two girls first?
Wiki User
∙ 7y ago
The fact that the two people are picking alternately first from one class and then from the second means that the first picker always has first selection from whoever is remaining in each class; thus for the first picker:
pr(1st girl) = 12/(12+13) = 12/25
Pr(2nd girl) = 11/(11+10) = 11/21
→ Pr(two girls picked) = pr(1st girl) × pr(2nd girl) = 12/25×11/21 = 44/175
Wiki User
∙ 7y ago
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A class of 14 boys and 11 girls. What is the probability of selecting a girl 1st and then a girl 2nd and then a boy third.?
Assuming the choices are made randomly and that the chosen people are not returned to the class, the probability is 77/690 = 0.1116 approx.
What is the probability that at least 2 people in the class of 25 will share the same birthday?
Birthdays are not distributed uniformly over a year but if, for the sake of probability games you assume that they are, then ignoring leap years, the probability is 0.5687. Including leap years, it is slightly lower.
How do you find the probability of a percent?
Go to math class!
Could someone help me with this simple probability density problem for my stats class?
otf
There are 100 students distributed into 4 classrooms. There are 54 girls and 46 boys. What is the probability that a class will have 15 girls?
I am not going to help you cheat in math class!!!!!!!!!!!!!
What are the chances of picking a boy out of a class with 12 girls and 9 boys?
If the person is picked at random, the the probability is 3/7.
If there are 5 girls and 10 boys in class what is the probability that he will call on a girl then a boy?
a 33.3333333333333333333% chance because there are 15 people in the class.
A class of 14 boys and 11 girls. What is the probability of selecting a girl 1st and then a girl 2nd and then a boy third.?
Assuming the choices are made randomly and that the chosen people are not returned to the class, the probability is 77/690 = 0.1116 approx.
What is the probability that at least 2 people in the class of 25 will share the same birthday?
Birthdays are not distributed uniformly over a year but if, for the sake of probability games you assume that they are, then ignoring leap years, the probability is 0.5687. Including leap years, it is slightly lower.
How do you find the probability of a percent?
Go to math class!
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.
There are 10 boys and 12 girls in a class if one student is selected at random from the class what is the probability it is a girl?
The probability is the number of girls divided by the number of students, so 12/22, or 6/11
If two students are chosen randomly at the same class what is probability to have the same birthday is it likely or unlikely?
It depends on how big the class is.
Two students are chosen at random from a class of 30 what is the probability that both you and your best friend are chosen?
The probability of this is based heavily on whether or not said best friend is even in the class. If both are in, it's a 1/870 chance.Ê
A class consists of 73 women and 18 men If a student is randomly selected what is the probability that the student is a man?
Since there are 73 Women, and 18 men, there are 91 people all together. The probability of the student being a man is 18 men out of the 91 total people. So, 18/91 or .1978.
What if a class of 25 students has 15 girls and boys if one student is chosen at random what is the probability it is a girl?
The probability is 15/25 = 3/5
If there are 45 students in a biology class and 23 are girls what is the probability that a student chosen at random will be a boy?
Probability that a girl is chosen = 23/45 = .511 So, the probability that a boy is chosen = 1 - .511 = .489
