Question

You randomly draw a marble from a bag of marbles that contains 777 blue marbles, 222 green marbles, and 111 red marble. What is \text{P(not draw a blue marble})P(not draw a blue marble)start text, P, left parenthesis, n, o, t, space, d, r, a, w, space, a, space, b, l, u, e, space, m, a, r, b, l, e, end text, right parenthesis?

Answer 1

3/10

Explanation:

Please see the attached file for explanation.

Answer 2

The probability of not drawing blue is 0.3

Explanation:

The bag contain a total of:

Blue marbles + green marbles + red marbles

= 777 + 222 + 111

= 1110

We are to find the probability of not drawing a blue marble, if a blue marble is not drawn then the drawn marble is either green or red marbles

P(not draw blue) = p(draw green) + p(draw red)

P(not draw blue) = 222/1110 + 111/1110

P(not draw blue) = 333/1110

P(not draw blue) = 0.3