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## anonymous 5 years ago two urns contain white balls and yellow balls. the first urn contains 5 white balls and 8 yellow balls and the second urn contains 9 white balls and 2 yellow balls. a ball drawn at random from each urn. what is the probability that both are white

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1. anonymous

since these are independent events you multiply the probabilities together. $\frac{5}{13}\times \frac{9}{11}$

2. anonymous

First probability = 5/13 Second probability = 9/11 Both = 5/13*9/11 = 31.5%

3. anonymous

vvSusan keeps track of the number of tickets sold for each play presented at The Community Theater. Within how many standard deviations from the mean do all the values fall? 135, 71, 69, 80, 158, 152, 161, 96, 122, 118, 87, 85 A. 3 B. 4 C. 5 D. 2

4. anonymous

@tkhunny help me please

5. tkhunny

Why are you hijacking this tread? 1) Calculate the standard deviation. 2) Note the min and max. 3) Calculate the answer to the question.

6. anonymous

for the question about the urn it's 1/9

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