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An integer is chosen at random and squar...

An integer is chosen at random and squared. Find the probability that the last digit of the square is 1 or 5.

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If n integers taken at random are multiplied together , then the probability that the last digit of the product is 1, 3, 7, or 9 is a. 2^n//5^n b. 4^n-2^n//5^n c. 4^n//5^n d. none of these

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If out of 20 consecutive whole numbers two are chosen at random, then find the probability that their sum is odd.

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CENGAGE PUBLICATION-PROBABILITY-All Questions
  1. A determinant is chosen at random from the set of the determinants of ...

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  2. A die is rolled thrice, find the probability of getting a larger nu...

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  3. An integer is chosen at random and squared. Find the probability th...

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  4. Find the probability that a leap year will have 53 Friday or 53 Sat...

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  5. A mapping is selected at random from the set of all the mappings of ...

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  6. In an entrance test, there are multiple choice questions. There are...

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  7. A laboratory blood test is 99% effective in detecting a certain diseas...

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  8. Die A has 4 red and 2 white faces, whereas die B has 2 red and 4 wh...

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  9. Each of the n urns contains 4 white and 6 black balls. The (n + 1)th u...

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  10. On a normal standard die one of the 21 dots from any one of the six fa...

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  11. Suppose families always have one, two, or three children, with prob...

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  12. An insurance company insured 2000 scooter drivers, 4000 car drivers ...

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  13. A pack of playing cards was found to contain only 51 cards. If the fir...

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  14. There are n letters and n addressed envelopes. Find the probability...

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  15. A bag contain n ball out of which some balls are white. If probability...

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  16. There are two bags, one of which contains 3 black and 4 white balls, ...

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  17. An urn contains 5 red and 5 black balls. A ball is drawn at random, it...

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  18. If two events Aa n dB are such that P(A^c)=0. 3 ,P(B)=0. 4 ,a n dP...

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  19. The probability that certain electronic component fail, when first use...

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  20. A die is thrown three times, if the first throw is a four, find the ...

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