A certain store sells small, medium and large toy trucks in each of the colors red blue green and yellow. The store has an equal number of trucks of each possible color-size combination. If Paul wants a medium red truck and his mother will randomly select one of the trucks in the store, what is the probability that the truck she selects will have at least one of the two features Paul wants?
A) 1/4
B) 1/3
C) 1/2
D) 7/12
E) 2/3
To make the situation easier to evaluate, let there be ONE of each size-color combination.
Draw a CHART and put an "X" under any truck that is either red, medium or both:
Of the 12 trucks in the chart, 6 are either red, medium or both.
P(selecting a good truck) = 6/12 = 1/2.
The correct answer is
C.
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