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A student has appeared for an examinatio...

A student has appeared for an examination.There are 20 questions in the paper,with four multiple answers.If he answers correctly,he gets 4 marks and if the answer is wrong,then he gets-1 mark.A student will pass in the examination if he gets 50% of the marks.If a student answer by sheer guessing,then what is the probability that he will pass in the examination?

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CHETANA PUBLICATION-BINOMIAL DISTRIBUTION-EXERCISE
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  2. If mean of a binomial distribution is 3 and variance is 3/2 the proba...

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  3. If X~B(n,P) and E(X)=12,Var(X)=4,then n=?

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  4. A die is thrown three times.The probability of obtaining at most two s...

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  5. In a binomial distribution,n=4.If 2P(X=3)=3P(X=2)then p=……….

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  6. Given that X~B(n=10,P) and E(X)=8,find the value of P.

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  7. The probability that the certain kind of component will survive a chec...

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  8. Let the p.m.f or r.v.x be P(X)=(4/x)(5/x)^x(4/9)^(4-x),x=0,1,2,3,4.Fin...

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  9. Let X~B(n,P) (i) If n=10,E(X)=5,find P and Var(X)

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  10. LetX~B(n,p)(ii)If E(X)=5 and Var(X)=2.5,find n and p.

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  11. A fair coin is tossed 6 times.Find the probability that it shows a lar...

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  12. Let X~B(n,p),if E(x)=5 and Var(x)=2.5,find n and p.

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  13. What is the probability of getting 'sum of 9' twice in 6 tosses of a p...

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  14. A machine has fourteen identical components that function independentl...

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  15. The probability that a lamp in a classroom will be burnt out is 0.3.Si...

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  16. A student has appeared for an examination.There are 20 questions in th...

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  17. A radar complex consists of eight units that operate independently.The...

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  18. A radar complex consists of eight units that operate independently.The...

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  19. It is possible for a computer to pick up an erroneous signal that does...

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  20. It is possible for a computer to pick up an erroneous signal that does...

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