A bag contains 3 red balls and 4 black balls. A balls is selected at random from the bag, what is the probability that the ball se

Question

A bag contains 3 red balls and 4 black balls. A balls is selected at random from the bag, what is the probability that the ball selected be 1) Black 2) red​

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Natalia 3 months 2021-07-24T14:07:28+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-07-24T14:08:34+00:00

    Answer:

    1)Black – 4/7

    2)Red – 3/7

    Step-by-step explanation:

    Probability = Number of observations

    —————————————-

    Total number of outcomes

    Data ,

    Red balls – 3

    Black balls – 4

    Total balls – 7

    1) P(getting a red ball) = 3/7

    2) P(getting a black ball) = 4/7

    0
    2021-07-24T14:09:01+00:00

    Answer:

    1) 3/7

    2) 4/7

    Step-by-step explanation:

    let black balls be b1, b2, b3 and red balls be r1, r2, r3, r4

    Let ‘s’ be the sample space

    S={b1, b2, b3, r1,r2,r3,r4}

    n(S) =7

    Let ‘A’ be the event 1) black

    A={b1, b2, b3}

    n(A) =3

    p(A) =n(A) /n(S)

    =3/7

    Let ‘B’ be the event 2) red

    B={r1, r2, r3, r4}

    n(B) =4

    p(B) =n(B) /n(S)

    =4/7

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