Homework Help: math

Posted by maymay on Monday, March 28, 2011 at 5:44pm.

There are 25 red, blue, yellow and
green marbles in a bag. Four of the marbles
are blue and the probability of selecting a blue
or green marble at random is 40%. Write
and solve an equation to determine the
number of green marbles in the bag

math - Reiny, Monday, March 28, 2011 at 5:52pm
prob(blue or green) = (4 + G)/25 = 40/100

4+G = 25(40)/100 = 10
G = 6

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