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On a multiple choice examination with three possible answers ( out of which only one is correct ) for each of the five questions, what is the probability that the candidate would get four or more correct answers just by guessing?
cbse
class12
modelpaper
2009
sec-b
q16
math
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asked
Dec 21, 2012
by
thanvigandhi_1
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0
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On a multiple choice examination with three possible answers for each of the five questions, what is the probability that a candidate would get four or more correct answers just by guessing ?
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A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. The probability that a student will get 4 or more correct answers just by guessing is :
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In an examination, 10 questions of true-false type are asked. A student toses a fair coin to determine his answer to each question. If the coin falls heads, he answers 'true' and if it falls tails, he answers 'false'. Show that the probability that he answers at most 7 questions correctly is \( \frac{121}{128} \).
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Feb 3, 2013
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thanvigandhi_1
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The probability of guessing correctly atleast 8 out of 10 answers on a true - false examination is :
asked
Jan 6, 2014
by
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The probability of guessing correctly at least 8 out of 10 answers on a true-false type examination is
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Jan 10, 2013
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True-or-False:A candidate is required to answer 7 questions out of 12 questions which are divided into two groups,each containing 6 questions. He is not permitted to attempt more than 5 questions from either group. He can choose the seven questions in 650 ways.
asked
May 16, 2014
by
sreemathi.v
cbse
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