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# is it a mistake ?

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A jar contains only red, white and blue marbles.It contains twice as many red marbles as white marbles and three times as many white marbles as blue marbles. If a marble is choosen at random, what is the probability that it is not red ?

A)$$\frac15$$

B)$$\frac25$$

C)$$\frac35$$

D)$$\frac45$$

$$\begin{array}{rcll} 2r &=&w \\ 3w\;(or\;6r)&=&b \end{array}$$

Alltogether there is 9r marbles the probability of choosing red marble is $$\frac19$$

the probability of not choosing red is $$1-\frac19=\frac89$$

Mar 31, 2016