The probability that a red marble selected at random from a jar containing \[x\]red, y blue and z green marbles is ____.

The probability that a red marble selected at random from a jar contai

1.	The probability that a red marble selected at random from a jar containing \[x\]red, y blue and z green marbles is ____.
A.	\[\frac{y}{x+y+z}\]
B.	\[\frac{x+z}{x+y+z}\]
C.	\[\frac{x}{x+y+z}\]
D.	\[\frac{y+z}{x+y+z}\]
Answer» D. \[\frac{y+z}{x+y+z}\]

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The probability that a red marble selected at random from a jar containing \[x\]red, y blue and z green marbles is ____.

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