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9th Class Mathematics Probability Question Bank Probability

  • question_answer
    Direction:  Two coins are tossed simultaneously 80 times and data is recorded in the table given.       
    Number of head in a trial 0 1 2
    Frequency 20 35 25
    What is the probability of getting atleast one head?

    A) \[\frac{3}{4}\]                                   

    B)        \[\frac{5}{16}\]                

    C)         \[\frac{1}{2}\]                                  

    D)         \[\frac{2}{9}\]

    Correct Answer: A

    Solution :

    From the data given the probability of getting atleast one head \[=\frac{35+25}{80}\] \[=\frac{60}{80}=\frac{3}{4}\] (\[\because \]Atleast one head means one or more htan on head.)


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