There is a bag filled with 3 blue and 5 red marbles. A marble is taken at random from the bag, the colour is noted and then it is replaced. Another marble is taken at random. What is the probability of getting 2 that are different in colour

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Step-by-step explanation:

What is the ratio of blue marbles to red marbles?

3:2

We are not given how many blue and red marbles there are but we can see that the ratio of blue to red marbles is 3:2.

m a t h w a y. c o m

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11