Mathematics
Grade-4-
Easy

Question

In a lottery there are 15 prizes and 30 blanks. A lottery is drawn at random. Then, the probability of a getting prize is_____.

  1. 1 fourth
  2. 1 third
  3. 1 half
  4. 1 fifth

Hint:

We have the find the probability of getting the prize if the lottery is picked randomly. Firstly we will find the total number of outcomes which is the sum of the prizes and blanks, then we will find the number of possible outcomes i.e. the number of prizes. Further we will find the probability by dividing number of possible outcomes by total number outcome.

The correct answer is: 1 third


    total no. of outcome = 15 +30 = 45
    no. of possible outcome(no. of prizes) = 15
    Probability =15 over 45 equals 1 third
    So, the probability of getting prize if the lottery is picked randomly is 1 third.

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    Among the following that cannot be a probability is

    TO FIND-
    Which of the given options can not be used to denote probability.
    SOLUTION-
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    FINAL ANSWER-
    Option 'b' i.e. '10' is the correct answer to the given question.

    Among the following that cannot be a probability is

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    TO FIND-
    Which of the given options can not be used to denote probability.
    SOLUTION-
    a. 10%
    10% = 10/100 = 0.1
    b. 10
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    10-10 = 1/1010 = 0.0000000001
    d. 1 over 10
    1/10 = 0.1
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    FINAL ANSWER-
    Option 'b' i.e. '10' is the correct answer to the given question.
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