math

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is this correct?

1.a jar contains 5 white, 15 violet,and 21 blue marbles. a marble is drawn at random. P(violet or white)

answer: 5x15x21= 1575
15x5=75
75/1575= 1/21


2. a number from 10 to 16 is drawn at random. P(a number greater than 14)

answer: 2/7

  • math -

    P(violet or white)=(5+15)/(5+15+21)

    2. YOu have 7 choices (10, 11, 12, ..16)

    of those, 15 and 16 are >14

    Pr(greater than 14)=2/7

  • math -

    24 don't know

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