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One in 9 ships is likely to be wrecked ,...

One in 9 ships is likely to be wrecked , when they are set on sail. When 6 ships set on sail, the probability for exactly, 3 will arrive safely is

A

`(25xx8^(3))/(9^(6))`

B

`1-(1)/(9^(6))`

C

`""^(6)C_(3)((8^(3))/(9^(6)))`

D

`""^(6)C_(3)((8^(6))/(9^(3)))`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-RANDOM VARIABLE -EXERCISE - II
  1. A box contains tickets numbered from 1 to 20. If 3 tickets are drawn o...

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  2. If on an average 1 vessel in every 10 is wrecked, the chance that out ...

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  3. One in 9 ships is likely to be wrecked , when they are set on sail. Wh...

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  4. The probability of happening of an event in a trial is 0.5. The probab...

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  5. The probability that an event does not happen in one trial is 0.8 The ...

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  6. 12 coins are tossed 4096 times. The number of times that one can get a...

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  7. Five coins are tossed 3200 times. The number of times getting exactly ...

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  8. A poisson variate x is such that P(x=2)=9P(x=4)+90.P(x=6) then mean an...

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  9. Suppose on an average 1 house in 1000 in a certain district has a fire...

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  10. A manufacturing concern emplyoing a large number of workers over a per...

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  11. If the number of telephone calls an operator receives between 10.00 pm...

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  12. The probability that an individual suffers a bad reaction from an inje...

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  13. Suppose there are 500 misprints in a book of 750 pages. Assuming that ...

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  14. In a book of 500 pages , it is found that there are 250 typing errors ...

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  15. A firm hires out 3 cars every day. The demand for a car on each day is...

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  16. Six coins are tossed 6400 times. The probability of getting 6 heads x ...

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  17. Six coins are tossed 9600 times. The probability of getting 5 heads 2 ...

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  18. Cycle tyres are supplied in lots of 10 and there is a chance of 1 in 5...

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  19. In a poisson distribution, the variance is m. The sum of terms in odd ...

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  20. A random variable x follows binomial distribution with mean a and vari...

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