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A marble will be randomly selected from a bag of solid-colored marbles. The probability of selecting a red marble is `5/19`. The probability of selecting a blue marble is `4/19`. What is the probability of selecting a red marble or a blue marble?

A

`1/19`

B

`9/19`

C

`9/38`

D

`20/38`

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A jar contains only red marbles and white marbles. If the probability of selecting a red marble is (r)/(y) , which of the following expressions gives the probability of selecting a white marble, in terms of r and y?

    A
    `(r-y)/(y)`
    B
    `(y-r)/(y)`
    C
    `(r)/(y)`
    D
    `(y)/(r)`

  • A jar contains only red marbles and white marbles, If the probability of selecting a red marble is r/y , which of the following expressions gives the probability of selecting a white marble , in terms of r and y?

    A
    `(r-y)/y`
    B
    `(y-r)/y`
    C
    `r/y`
    D
    `y/r`

  • A bag contains 4 red marbles, 7 white marbles and 3 blue marbles. If Sue pulls one marble from the bag. What is the probability that the marble will be blue ?

    A
    `1/(14)`
    B
    `1/(11)`
    C
    `3/(14)`
    D
    `3/(11)`

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