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A four digit number (numbered from 0000 ...

A four digit number (numbered from 0000 to 9999) is said to be lucky if sum of its first two digits is equal to the sum of its last two digits. If a four digit number is picked up at random then the probability that it is lucky number is :-

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ARIHANT MATHS-PROBABILITY-Exercise (Questions Asked In Previous 13 Years Exam)
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  2. find the derivative of sin x cos x

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  3. A six-faced fair dice is shown until 1 comes. Then the probability tha...

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  4. Let A and B be two events such that Poverline((AcupB))=(1)/(6),P(AcapB...

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  5. Three houses are available in a locality . Three persons apply for th...

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  6. A randam variable X has Poisson's distribution with mean 2. Then , P(X...

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  7. There are n urns each containing (n+1) balls such that ith urn contain...

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  8. In a telephone enquiry system, the number of phone calls regarding rel...

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  9. Indian and four American men and their wives are to be seated randomly...

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  10. Let H1, H2,..., Hn be mutually exclusive events with P (Hi) > 0, i = ...

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  11. Let E^c denote the complement of an event E. Let E,F,G be pairwise ind...

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  12. A pair of four dice is thrown independently three times. The probabili...

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  13. Two aeroplanes I and II bomb a target in succession. The probabilitie...

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  14. An experiment has 10 equally likely outcomes. Let A and B be two non-e...

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  15. Evluate int (cosx+x) dx

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  16. A die is thrown. Let A be the event that the number obtained is grea...

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  17. It is given that the events A and B are such that P(A)=1/4, P(A/B)=1/2...

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  18. A fair die is tossed repeatedly until a 6 is obtained. Let X denote th...

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  19. A fair die is tossed repeatedly until a 6 is obtained. Let X denote th...

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  20. A fair die is tossed repeatedly until a 6 is obtained. Let X denote th...

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  21. In a binomial distribution B (n, p=(1)/(4)), if the probability of at...

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