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In a village of 50 people, 20 people have their fast on 2nd october. Two persons are selected at random out of them. Write the probability distribution for selected persond who are on fast. Also, find the mean of the distribution.
cbse
class12
modelpaper
2012
sec-b
q22
math
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Jan 28, 2013
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thanvigandhi_1
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(i) In the village of 50 people 25 people have their fast on republic day. Two persons are selected at random out of them, write the probability distribution who are on fast. Also find the mean of the distribution. (ii) What do you mean by republic?
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Jan 13, 2013
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Jan 28, 2013
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thanvigandhi_1
cbse
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There are $80$ workers in a publication house. Out of which $20$ are hardworking and honest. Three workers are selected at random out of them. Write the probability distribution for the selected workers who are hardworking and honest. Also find the mean of the distribution. Write the importance of hardworking and honesty in one’s life.
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Jan 23, 2015
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In a school, 15 N.S.S. volunteer selected for cultural activities of which 3 are extras 3 volunteers are selected at random out of them. Let X denote the number of volunteer as extras. Find the probability distribution of X.
asked
Jan 22, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
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0
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A biased die is twice as likely to shown an even number as an odd number. The die is rolled three times. If occurance of an even number is considered a success, then write the probability distribution of number of successes. Also find the mean number of successes.
asked
Feb 3, 2013
by
thanvigandhi_1
cbse
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+1
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0
answers
In a class, having 60% boys, 5% of the boys and 10% of the girls have an I.Q. of more than 150. A student is selected at random and found to have an I.Q. of more than 150. Find the probability that the selected student is a boy.
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Jan 4, 2013
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thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q22
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0
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answers
Two bags A and B contain 2 white, 4 red and 3 white, 3 red balls respectively. One of the bags is selected at random and a ball is drawn from it. If the selected ball is of white colour, find the probability that it is drawn from bag A.
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Jan 11, 2013
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thanvigandhi_1
cbse
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