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11 March, 14:59

Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000. How many pennies in Russell's collection are dated after 2000

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Answers (2)
  1. 11 March, 15:28
    0
    40% dated after 2000
  2. 11 March, 17:26
    0
    The total pennies in Russell's collection dated after 2000 is 800

    Step-by-step explanation:

    Given

    Total Pennies: 1,200

    Pennies before 1980: 25%

    Pennies between 1980 and 2000: 35%

    Required

    Number of pennies in Russell's collection are dated after 2000

    Let P1 represent pennies dated before 1980

    Let P2 represent pennies dated between 1980 and 2000

    Let P3 represent pennies dated after 2000

    To calculate the number of pennies dated after 2,000. you have to understand that his total collection of pennies is 100%

    This means that

    P1 + P2 + P3 = 100%

    Where P1 = 25% and P2 = 35%.

    So, we're solving for P3

    By substituting, P1 = 25% and P2 = 35%, we have

    25% + 35% + P3 = 100%

    60% + P3 = 100%

    Make P3 the subject of formula

    P3 = 100% - 60%

    P3 = 40%

    The quantity of pennies dated after 2,000 is then calculated by P3 * Total.

    i. e. 40% * 2000

    = 0.4 * 2000

    = 800

    Hence, the total pennies in Russell's collection dated after 2000 is 800
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