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Suppose that 5% of men and 0.25% of wome...

Suppose that 5% of men and 0.25% of women have grey hair. A grey haired person is selected at random. What is the probability of this person being male? Assume that there are equal number of males and females.

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The correct Answer is:
`(20)/(21)`
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ACCURATE PUBLICATION-PROBABILITY -Questions Carrying Type - 4 marks
  1. Of the students in a college, it is known that 60% reside in hostel an...

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  2. 40% students of a college reside in hostel and the remaining reside ou...

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  3. Suppose that 5% of men and 0.25% of women have grey hair. A grey haire...

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  4. Assume that the chances of a patient having a heart attack is 40%. It ...

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  5. Suppose a girl throws a die. If she gets a 5 or 6, she tosses a coin t...

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  6. A card from a pack of 52 cards is lost. From the remaining cards of th...

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  7. A man is known to speak the truth 4 times out of 5 times. He throws a ...

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  8. There see three coins,one is a two headed coin (having head on both th...

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  9. In a factory which manufactures bolts, machines A, B and C manufacture...

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  10. An insurance company insured 2000 scooter drivers, 4000 car drivers an...

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  11. In a group of 400 people, 160 are smokers and non-vegetarian, 100 are ...

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  12. A random variable X has the following probability distribution: D...

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  13. Two cards are drawn successively with replacement from a well-shuffled...

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  14. A urn contains 4 white and 6 red balls. Four balls are drawn at random...

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  15. From a lot of 10 bulbs which include 3 defectives, a sample of 2 bulbs...

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  16. Find the probability distribution of number of doublets in three throw...

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  17. In a group of 30 scientists working on an experiment, 20 never commit ...

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  18. Find the probability distribution of number of doublets in three throw...

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  19. Two cards are drawn successively with repalcement from a well-shuffled...

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  20. Three cards are drawn successively with replacement from a well shuffl...

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