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The probability that an individual is left handed is 0.1 In a class of 30 students what is the probability of finding at least 5 left hander's?
Wiki User
∙ 14y ago
This is a binomial probability distribution. The number of trials, n, equals 30; and the probability of success is p, which is 0.1. In this problem, you want the probability of at least 5, which is the complement of at most 4. We use the complement because we can subtract from 1 that probability and we will have the solution. The related link has the binomial probability distribution table which is cumulative. Per the table, at n=30, p=0.1 and x = 4; the probability is 0.825. Therefore the probability of at least 5 is 1 - 0.825 or 0.175.
Wiki User
∙ 14y ago
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The probability that an individual is left handed is 0.11 In a class of 40 students what is the probability of finding five left handers?
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 %
What is the percentage of left hand people in the world?
Hi, as a left hander myself ive had an interest in this, im led to believe through the media we are 1 in every 10 on average.If it interests you, you can search the net for more info about lefties, we were considered half wits, evil doers, witches or the male counterpart, hence some of the unkindly nicknames such as kackhanded etc, basically the history of lefties has been pretty grim, with no tolerance from the right handed majority, these prejudices carried right through the Victorian era into about the 1930s-1940s, luckily now attitudes have changed....i hope....(otherwise someone will feel my southpaw) lol.Also their is a theory that we are the survivor of mirror twins, when our right handed bro or sis may have been lost in very early pregnancy, & we were the survivor.... this is only a theory though!!AnswerBoth my husband, an identical twin with a right-handed brother, and my son, a fraternal twin with a right handed sister are left handed. There is a stirore in London which sells stuff for left handed foldk and we have a left-handed milkpan and a left handed can opener. though funnily enough the right-handers in the family find the left-handed opener easier to use while husband uses the right-handed one.http://www.anythingleft-handed.co.UK/
How does the temporal lobe differ for right handers and left handers?
no
Do left handers die earlier than right handers?
in a survey a few years ago it said on average left handers die 7-9 years before right handers
Who is the patron saint of left handers?
There is no patron saint of left handers.
What are the similarities between dominant and recessive hands?
right-handers are said to be dominant.......while left-handers are recessive. U don't see left handers a lot, do you? (no offense to any left-handers)
Who is smarter left handers or right handers?
There is no link between hand preference and intelligence.
What day is national left handers day?
International Left-Handers Day is August 13.
Are guns made for left handers?
Yes, some makers do make firearms for left handers. Remington comes to mind.
Is there a National Left-Handers Day?
Yes, on the 13th August.(Well, there is in the UK anyway where about 2,500,000 left handers gather)
The probability that an individual is left handed is 0.11 In a class of 40 students what is the probability of finding five left handers?
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 %
Were left handers targeted by the holocaust?
No.
Does left handers die earlier?
well, they are the same as right handed peoples aren't they just write with different hands! It depends on what you get into though.
Sports left handers can not play?
Field hockey
