A bag has 6 red rocks, 1 orange rock, 4 blue rocks, 1 white rock, and 7 yellow rocks. You randomly pull a rock from the bag, keep it out and

Question

A bag has 6 red rocks, 1 orange rock, 4 blue rocks, 1 white rock, and 7 yellow rocks. You randomly pull a rock from the bag, keep it out and then pull out another one. What is the probability of not getting a orange and then not getting a orange?

in progress 0
Thái Dương 3 years 2021-08-27T09:03:14+00:00 1 Answers 12 views 0

Answers ( )

    0
    2021-08-27T09:05:06+00:00

    Answer: 17/19

    Step-by-step explanation:

    Number of red rocks = 6

    Number of orange rock = 1

    Number of blue rocks = 4

    Number of white rock = 1

    Number of yellow rocks = 7

    Total number of rocks = 19

    Probability of not getting a orange the first time will be (1 – 1/19) = 18/19.

    Probability of not getting an orange the second time will be: (1 – 1/18) = 17/18

    Probability of not getting an orange on both occasion will be:

    = 18/19 × 17/18

    = 17/19

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )