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In a multiple choice question, there are...

In a multiple choice question, there are four alternative answers of which one or more than one is correct A candidate will get marks on the question only if he ticks the correct answer. The candidate decides to tick answers at a random. If he is allowed up to three chances to answer the question, then find the probability that he will get marks on it.

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A DAS GUPTA-Elementary Probability-Exercise
  1. A box contains 2 black, 4 white, and 3 red balls. One ball is drawn at...

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  2. A bag contains 9 white balls and 1 black ball. Another bag contains 10...

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  3. In a multiple choice question, there are four alternative answers of ...

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  4. Cards are drawn one at random from a well shuffled full pack of 52 ...

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  5. A square is inscribed in a circle with radius 7sqrt(2) units. Find the...

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  6. n different letters are put at random in n addressed envelopes. What ...

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  7. A die is tossed and when 6 appears then a coin is tossed two times. Wh...

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  8. A private tutor admits 10 students, boys or girls, in a batch. The pr...

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  9. If in 6 trials of an experiment the probability of a successes is 5 ti...

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  10. Suppose the probability for A to win a game against B is 0.4. If A has...

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  11. A hotel has 5 rooms for rental and they are always occupied. The owner...

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  12. Numberse are selected at random, one at a time, from the two-digit num...

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  13. The minimum number of tosses of a pair of dice so that the probability...

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  14. There is a circle in the x-y plane whose equation is x^2+ y^2 = 49 a...

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  15. There are two circles in the x-y plane whose equations are x^2+ y^2 - ...

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  16. If there are 50 students in a class out of which 35 are boys.if only 6...

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  17. A real number x is selected at random from the solution set of inequ...

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  18. Three tangents are drawn at random to a given circle. Show that the od...

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  19. A floor is paved with rectangular marble blocks, each of length a and ...

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  20. A letter is taken out at random from 'ASSIGNMENT' and another from 'A...

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