The multiplier is 4 (3*4=12, 4*4=16), so 10*4 is 40, therefore the ratio is 10:40
Or is it half empty tell me that
Answer:
0.3085,0.2417,0.0045
Step-by-step explanation:
Given that X, the amount of money spent at shopping centers between 4 P.M. and 6 P.M. on Sundays has a normal distribution with mean $85 and with a standard deviation of $20.
X is N(85, 20)
To convert into std normal variate we use the following formula
![Z=\frac{x-85}{20}](https://tex.z-dn.net/?f=Z%3D%5Cfrac%7Bx-85%7D%7B20%7D)
a) the probability that he has spent more than $95 at the mall
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b. the probability that he has spent between $95 and $115 at the mall
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c. If two shoppers are randomly selected, what is the probability that both shoppers have spent more than $115 at the mall
=product of two probabilities since independent
= ![{P(X>115)}^2\\= P(Z>1.5)*P(Z>1,5)\\= 0.0668^2\\=0.0045](https://tex.z-dn.net/?f=%7BP%28X%3E115%29%7D%5E2%5C%5C%3D%20P%28Z%3E1.5%29%2AP%28Z%3E1%2C5%29%5C%5C%3D%200.0668%5E2%5C%5C%3D0.0045)
Answer:
my guy did you repost this as I just answered this about ten minutes ago
Answer:
yes the vaule of x do not repeat
Step-by-step explanation: