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In a book of 200 pages, 200 misprints are randomly distributed. Using Poisson's distribution calculate the probability that a randomly observed page of the book will be found to have atlest 3 errors. [Use: e -1 =0.3679]
cbse
class12
modelpaper
2005
sec-c
q22
math
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Jan 24, 2013
by
fingeazy
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In a book of 500 pages, it is found that there are 250 typing errors. Assume that Poisson law holds for the number of errors per page. Then, the probability that a random sample of 2 pages will contain no error, is :
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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.
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Jan 24, 2013
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fingeazy
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A company has two plants to manufacture motor cycled. 70% motor cycles are manufactured at the first plant, while 30% are manufactured at the second plant. At the first plant, 80% motor cycles are rated of the standard quality while at the second plant, 90% are rated of standard quality. A motor cycle, randomly picked up, is found to be of standard quality. Find the probability that it has come out from the second plant.
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Jan 24, 2013
by
fingeazy
cbse
class12
modelpaper
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sec-c
q21
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To test the quality of electric bulbs produced in a factory, two bulbs are randomly selected from a large sample without replacement. If either bulb is defective, the entire lot is rejected. Suppose a sample of 200 bulbs contains 5 defective bulbs. Find the probability that the sample will be rejected.
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Jan 29, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q22
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0
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1
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It is found that a book will contain $350 pages$ if $32$ lines are allowed in a page how many lines should be allowed in a page, if the book is to contain 280 pages .
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Aug 12, 2015
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meena.p
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Find the present worth of an ordinary annuity of Rs. 1,200 per annum for 10 years at 12% per annum, compounded annually. [Use (1.12) -10 =0.3221]
asked
Jan 24, 2013
by
fingeazy
cbse
class12
modelpaper
2005
sec-c
q24
math
0
votes
0
answers
Coloured balls are distributed in three bags as shown in the table below, a bag is selected at random and then two balls are randomly drawn from the selected bag. They happen to be black and red. what is the probability that they came from bag 1 ?
asked
Dec 20, 2012
by
thanvigandhi_1
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class12
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