A bag consists of 20 marbles, of which 5 are blue, 7 are red, and the remainder are white. If Lisa is to select a marble from the bag at random, what is the probability that the marble will be red or white?	Choices:  A) 3/4  B) 2/4  C) 1/4  D) 1/8  E) 1/16
bag consists of 20 marbles, of which 5 are blue, 7 are red   remainder are white. So, white = 20 - 5 - 7= 
<gadget id="calculator">20 - 5 - 7</gadget>
<output>8</output>
8.   probability that the marble will be red or white= probability that the marble will be red + probability that the marble will be white   probability that the marble will be red or white = 7/20+8/20 = 15/20 = 3/4   Hence, answer will be 3/4.
<result>A</result>
A bag consists of 20 marbles, of which 5 are blue, 7 are red, and the remainder are white. If Lisa is to select a marble from the bag at random, what is the probability that the marble will be red or white?