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In a group of student, selection of four students for cultural activity from 3 boys and 3 girls has to be done. Find the probability that either 3 boys and 1 girl or 3 girls and one boy are selected.
cbse
class12
modelpaper
2012
sec-b
q22
math
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asked
Feb 2, 2013
by
thanvigandhi_1
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Related questions
(i) In a group of student, selection of four students for cultural activity from 3 boys and 3 girls has to be done. Find the probability that either 3 boys and 1 girl or 3 girls and one boy are selected. (ii) Write the importance of co-curricular activities in inculcating human values.
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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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Assume that each child born is equally likely to be a boy or girl. If a family has two children, what is the conditional probability that both are girls given that (a) the eldest is a girl (b) at least one is a girl (c) pre-natal *** determination is a crime. What will you do if you come to know that some of your known is indulging in pre-natal *** determination?
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In a class having 70% boys, 20% of the boys, and 10% of the girls are players. A student is selected at random from the class and found to be a player. Find the probability that the selected is a girl. Explain the contribution of sports in inculcating human values.
cbse
class12
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2012
sec-c
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Jan 21, 2013
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In a class having 70% boys, 20% of the boys and 10% of the girls are players. A student is selected at random from the class and is found to be a player. Find the probability that the selected student is a girl.
cbse
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2012
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Jan 3, 2013
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A class consists of 50 students out of which there are 10 girls.In the class 2 girls and 5 boys are rank holders in an examination.If a student is selected at random from the class and is found to be a rank holder,what is the probability that the student selected is a girl?
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Apr 15, 2013
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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.
cbse
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2012
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Jan 22, 2013
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thanvigandhi_1
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