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A die is thrown twice and the sum of the...

A die is thrown twice and the sum of the numbers appearing is observed to be 6. What is the conditional probability that the number 4 has appeared at least once?

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The correct Answer is:
`(2)/(5)`
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BETTER CHOICE PUBLICATION-PROBABILITY-Previous year Board.s questions for practice
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  2. Let E and F be events with P(E)=3/5, P(F)=3/10 and P (E cap F)=1/5. Ar...

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  3. A die is thrown twice and the sum of the numbers appearing is observed...

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  4. A die is thrown. If E is the event ‘the number appearing is a multiple...

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  5. Given that the two numbers appearing on throwing two dice are differen...

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  6. If a fair of coin is tossed 10 times, find the probability of : (i) ...

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  7. In a single throw of three dice, determine the probability of getting ...

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  8. In a single throw of two dice, find the probability of total of 9 or I...

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  9. In a single throw of two dice, find the probability of total of 9 or 1...

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  10. Five dice are thrown simultaneously . If the occurence of 1,3 or 5 in ...

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  11. Ten coins are thrown simultaneously . Find the probability of getting ...

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  12. An unbiased die is thrown twice. Let the event A be ‘odd number on the...

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  13. Find the probability of getting 5 exactly twice in 5 throws of a die .

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  14. A die is tossed thrice. Find the probability of getting an odd number ...

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  15. Find the probability distribution of the number of tails when three co...

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  16. A coin is biased so that the head is 3 times as likely to occur as tai...

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  17. A problem is given to three children whose chances of solving the prob...

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  18. In a tape recorder factory, three machines A, B and C produced 50%, 30...

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  19. Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5...

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  20. Let a pair of dice be thrown and the random variable X be the sum of t...

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