We'd like to know the likelihood that any 5 people chosen from 20 will be left-handed if the probability of being left-handed is assumed to be 10%. Well, 5 people can be chosen from 20 in (20 C 5) = 15504 ways. So, we have (15504)*(.1^5)*(.9^15) = 3.19%. This is a Binomial probability problem, where we are interested in 'k' successes (k = 5, success --> people being left-handed) in 'n' trials (n = 20).
The probability is approx 0.81
The probability that both will be hopelessly romantic is .0081 .009^2 = .0081
It is pretty close to 0. It is estimated as the number of people in the NFL divided by the total population of the world!
If the probability of a person being left handed is .11, then the probability of a person being right handed is .89 (1.00 - .11). In a class of 40 people, there are 40! (40 factorial) = 40 x 39 x 38 x .... x 3 x 2 x 1 possible Permutations of students. Within this number, there are many that will yield exactly 5 left handed people. 40-P-5 is the number of Permutations of 5 within a class of 40 (sorry, can't use the correct formating here!): = 40! / (40 - 5) ! = 40! / 35! = 40 x 39 x 38 x 37 x 36 Since we don't care about order..... we need to factor out the number of identical permutations. 40-C-5 = 40-P-5 / 5! So.... (40 x 39 x 38 x 37 x 36) / (5 x 4 x 3 x 2 x 1) = 658,008 Now, what is the probability of any one such combination? (.89 to the power 35) x (.11 to the power 5) = 0.000000273 So the probability of exactly 5 left handed people in the class is 658,008 x .000000273 = 17.9408137 %
The probability with 30 people is 0.7063 approx.
The probability is approx 0.81
The worlds population of left handed people is approximately 11%
Approximately 10% of the global population is left-handed.
The probability that both will be hopelessly romantic is .0081 .009^2 = .0081
96% of people are right handed
66 divided by 400 gives you the fraction of people who are left handed. Multiply by 100 to get your answer.
This is closer to about 1% of the population. Most people are pretty similar in regards to the chromosomes that they carry.
There is no definitive answer as sexual orientation and handedness are independent traits. Studies have shown that handedness is not significantly correlated with sexual orientation.
About 90% of the total population is right handed.
The probability is approx 0.0001043
Approximately 5-10% of Germans are estimated to be vegetarian. This number has been increasing steadily in recent years due to growing concerns about health, animal welfare, and the environment.
The answer would depend on the demographics of the population: a probability of 0.2 it too high unless the population is from a retirement area.