Question #3c669

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Question #3c669

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Answer 1 · 2017-05-21T15:05:28

Both:
Green $= \frac{1}{25}$ $= 1/25$
Red $= \frac{9}{100}$ $= 9/100$
Blue $= \frac{1}{4}$ $= 1/4$

Red and blue(the order is irreverent because of the replacement) $= \frac{3}{20}$ $= 3/20$

Explanation:

The overall of marbles are 10 which mean that the blue probability is $\frac{5}{10} = \frac{1}{2}$ $5/10=1/2$ , the red
$\frac{3}{10}$ $3/10$ , and the green
$\frac{2}{10} = \frac{1}{5}$ $2/10=1/5$ .
No matter which draw since they have replacement.
Since you need to check both of them you need to use $\times$ $xx$ (if it was "or" we'll use +)
A. Both red $\frac{3}{10} \times \frac{3}{10} = \frac{9}{100}$ $3/10xx3/10=9/100$
B. Both green $\frac{1}{5} \times \frac{1}{5} = \frac{1}{25}$ $1/5xx1/5=1/25$
C. Both blue $\frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$ $1/2xx1/2=1/4$
D. Red and blue(the order is irreverent because of the replacement. $\frac{3}{10} \times \frac{1}{2} = \frac{3}{20}$ $3/10xx1/2=3/20$

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Question #3c669

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