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The probability that a student entering an university will graduate is 0.4. Find the probability that out of 3 students of the university: (i) none will graduate (ii) only one will graduate (iii) all will graduate.
cbse
class12
modelpaper
2012
sec-b
q21
math
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asked
Jan 7, 2013
by
thanvigandhi_1
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The probability that student entering a university will graduate is 0.4. Find the probability that out of 3 students of the university: • None will graduate, • Only one will graduate, • All will graduate.
asked
Jan 24, 2013
by
fingeazy
cbse
class12
modelpaper
2005
sec-c
q22
math
0
votes
0
answers
Principal and staff of a school decided to award prizes to their students for three values Honesty (x) cleanliness (y), Punctuality (z) in two groups. Group A ( upto class VIII) and group B ( IX - XII). It is decided that Rs. 12000 for three values (x, y, z) for 3, 4, 5 students of Group A and Rs. 11040 for 5, 4, 3 student of group B respectively. If all the three prizes together amount to Rs. 2880, then (i) Represent above situation by a matrix equation and form linear equation using matrices. (ii) Is it possible to solve the system of linear equations so obtained using matrices? (iii) Which value you prefer to be rewarded most and why?
asked
Jan 21, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q13
math
0
votes
0
answers
A can hit a target 4 times in 5 shots, B 3 times in 4 shots and C 2 times in 3 shots. Calculate the probability that \[\begin{array}{1 1} ((i) \: A,B,C\: all \: may \: hit. \\ (ii)\: Any\: two \: of \: A,B\: and \: C\: will\: hit \ the \: target. \\ (iii)\: None \: of\: them \: will \: hit \: the \: target.\\(iv)None \:of\:hem\:will\:hit\:the\:target. \end{array} \]
asked
Jan 10, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-c
q29
math
0
votes
0
answers
The probability of student E passing an examination is 0.6 and of student F is 0.2. Assuming that the two events 'E passes' and 'F passes' are independent. Find the probability of : (i) both the students passing the examination (ii) Only E passing the examination.
asked
Jan 24, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-c
q29
math
0
votes
0
answers
(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.
asked
Jan 14, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q22
math
0
votes
0
answers
There are two bags I and II. Bag I contains 2 white and 3 red balls and Bag II contains 4 white and 5 red balls. One ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn from bag II.
asked
Jan 3, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q21
math
0
votes
1
answer
The probability that a bulb produced by a factory will fuse after 150 days of use is 0.05. Find the probability that out of 5 such bulbs \[ \text{ (i) none (ii) not more than one (iii) more than one (iv) at least one} \] will fuse after 150 days of use.
asked
Nov 27, 2012
by
balaji.thirumalai
cbse
class12
bookproblem
ch13
sec5
p577
q5
sec-b
easy
math
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