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If four whole numbers taken at random are multiplied together, then find the probability that the last digit in the product is 1,3,7 or 9.

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CENGAGE PUBLICATION-PROBABILITY-All Questions
  1. Let A and B be two independent events. The probability of their sim...

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  2. The odds against a certain event are 5 to 2, and the odds in favour of...

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  3. If four whole numbers taken at random are multiplied together, then fi...

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  4. A rifleman is firing at a distance target and hence has only 10% ch...

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  5. One of 10 keys open the door. If we try the keys one after another, ...

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  6. An electrical system has open-closed switches S1, S2 and S3 as shown i...

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  7. A bag contains 3 white, 3 black and 2 red balls. One by one, three ...

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  8. The unbiased dice is tossed until a number greater than 4 appear. W...

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  9. X speaks truth in 60% and Y in 50% of the cases. Find the probabili...

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  10. In a bag there are 6 balls of which 3 are white and 3 are black. They ...

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  11. The odds against a certain event are 5 to 2, and the odds in favour of...

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  12. In a certain population, 10% of the people are rich, 5% are famous, an...

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  13. A coin is tossed three times. Event A: two heads appear Event B: last ...

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  14. Events A and B are such that P(A) =(1)/(2), P(B) =(7)/(12) and "P(not ...

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  15. From a pack of 52 cards, two are drawn one by one without replacement....

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  16. A coin is tossed and a dice is rolled. Find the probability that th...

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  17. The probability of happeining an event A in one trial is 0.4. Find the...

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  18. A, B, C in order draws a card from a pack of cards, replacing them aft...

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  19. The probability of hitting a target by three marksmen are 1/2, 1/3 a...

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  20. Three persons work independently on a problem. If the respective pr...

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