Answer:
x = 3.36
Step-by-step explanation:
, if we have a fraction = fraction then we can cross multiply to have a multiplication problem
x · 1 = 8 · 0.42, multiply
x = 3.36
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2 answers:
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Since the blue marble you selected is not replaced. There are now 3 blue marbles and 2 red ones. That is, 5 total. The probability that the second marble is red is
We multiply these to obtain the probability of Blue followed by Red. The probability is
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(b) To find the probability that both marbles are blue we need to find probability of each. First as there are 4 Blue marbles and 2 Red ones, there are 6 marbles all together. The probability that the first marble is Blue is
Since the blue marble you selected is not replaced. There are now 3 blue marbles and 2 red ones. That is, 5 total. The probability that the second marble is also blue is is
We multiply these to obtain the probability of Blue followed by Blue. The probability is
Typically you leave the probability as a fraction but since you were asked for the answer to the nearest tenth of a percent we divide 12 by 30 to obtain .4 which we multiply by 100 to get 40%