Question 72171: Hello to everyone I had some questions about some fractions that involve probability that I need help with,The first one is,Suppose you toss a coin and roll a die.What is the probability that you toss heads and roll a 4?The next one is,A bag contains 6 red marbles,9 blue marbles,and 5 green marbles.You withdraw one marble,replace it,and then withdraw another marble.What is the probability that you do not pick two green marbles?Third one is,actually a proportion question that involves fractions,Solve the proportion:16 over 4d +2=8 over 3.And final question is,A solution contains 2.2 liters of water.Convert this measurement to milliliters, oh sorry that one doesn't involve fractions in it but thank you for whoever helps.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Suppose you toss a coin and roll a die.What is the probability that you toss heads and roll a 4?
These are independent events:
P(H and 4) = P(H)*P(4) = 1/2 * 1/6 = 1/12
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The next one is,A bag contains 6 red marbles,9 blue marbles,and 5 green marbles.You withdraw one marble,replace it,and then withdraw another marble.
What is the probability that you do not pick two green marbles?
P(g and g) = 5/20 = 1/4
P(not two green) = 1-1/4 = 3/4
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Third one is,actually a proportion question that involves fractions,Solve the proportion:16 over 4d +2=8 over 3.
16/(4d+2) = 8/3
Cross multiply to get:
48 = 32d+16
32d=32
d=1
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And final question is,A solution contains 2.2 liters of water.Convert this measurement to milliliters
2.2 liters (1000 ml/1 liter) = 2200 ml
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Cheers,
Stan H.
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