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     EduGorilla 
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    The mean of the following distribution is 18.

    Class interval Frequency
    11 – 13 3
    13 – 15 6
    15 – 17 9
    17 – 19 13
    19 – 21 f
    21 – 23 5
    23 – 25 4


    What is the value of f?

    Options :-

    1. 8
    2. 9
    3. 10
    4. 11
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