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11th Standard English Medium Maths Subject Introduction To Probability Theory Creative 3 Mark Questions with Solution Part - I

11th Standard

    Reg.No. :
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Maths

Time : 01:00:00 Hrs
Total Marks : 15

    3 Marks

    5 x 3 = 15
  1. Two unbiased die are thrown. Find the probability that the sum is 8 or greater if 3 appears on the first die.

  2. A basket contains 20 apples and 10 oranges out of which 5 apples and 3 oranges are defective. If a person takes out 2 at random what is the probability that either both are apples or both are good?

  3. The probability that a person will get an electric contract  \(\frac { 2 }{ 3 } \) and the probability that he will not get plumbing contract is \(\frac { 4 }{ 7 } \). If the probability of getting atleast one contract is \(\frac { 2 }{ 3 } \). What is the probability tht he will get both? 

  4. A and B are two events such that P(A) \(\neq \) 0. Find P(B/A) if (i) A is a subset of B (ii) A\(\cap \)B = \(\phi \)

  5. In a box containing 10 bulbs, 2 ae defective. What is the probability that among 5 bulbs chosen at random, none is defective?

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