(Answered) A bag has 5 green marbles and 10 brown marbles half of the

Statistics

A bag has 5 green marbles and 10 brown marbles. Half of the brown marbles are made of plastic. A marble is selected at random from the bag. What is the probability that it is a brown, plastic marble?

If an area of 300 square centimeters contains .28 ug/mL of a substance how much of the substance would be in 100 square centimeters?

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