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  1. The two years between which the rate of change of cellular phones is minimum are ?

    2. A.

    1997 and 1998
    B.

    1999 and 2000
    C.
    Both option (A) and (B)
    D.

    2001 and 2002

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    Answer : Option C

    Explanation :

    The lowest rate of change for

    For year 1997 and 1998 = ((48000 - 40000) / 40000) x 100 = 20%

    For year 1999 and 2000 = ((30000 - 25000) / 25000) x 100 = 20%

    is exhibited by both option (A) and (B).

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