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If 7 squares are chosen at random on a c...

If 7 squares are chosen at random on a chess board, the probability that they lie on a diagonal line is

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The correct Answer is:
`(20)/(.^(64)C_(7))`
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AAKASH SERIES-PROBABILITY-Additional Exercise
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  4. Find the probability that leap year contains 52 mondays and 52 Sundays

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  5. If P(A)=0.5, P(B)=0.3 and P(AnnB)=0.1 then find the probability that e...

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  7. If 2 dice are rolled then find the probability that the dice show diff...

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  8. If 2 dice are rolled, find the probability of getting prime sum.

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  9. If one card is drawn at random from a pack of cards then show that eve...

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  10. Let A be the event of having 53 sundays and B be the event of having 5...

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  13. Two coins are tossed . The probability of getting 2 tails if it is kno...

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  14. From 1,2,3,…..20 if two natural numbers are selected, find the probabi...

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  15. Two cards are drawn from a pack of 52 cards . What is the probability ...

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  16. A speaks truth in 60% of the cases and B in 70% of the cases. What is ...

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  17. One die and a coin tossed simultaneously find the probability of getti...

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  18. A bag contains 4 white and 3 black balls. Another bag contains 5 white...

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  19. If A, B, C are three mutually exclusive and exhaustive events such tha...

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  20. Bag A contains 3 red and 2 balck balls and bag B contains 2 red and 3 ...

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