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JASMINEM8347
23.09.2019 •
Mathematics
Trucks that travel on highways have to stop at various locations to be weighed and inspected for safe brakes and light systems. of these trucks, 76% are on interstate commerce while 24% are intrastate. of the intrastate trucks, 3.4% are flagged for safety defects compared to 0.7% of those that are on interstate business. complete parts a through c below. a. calculate the probability that a randomly chosen truck is an interstate truck and is not flagged for a safety violation. the probability is nothing. (round to three decimal places as needed.)
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Ответ:
The reuired probability is 0.756
Step-by-step explanation:
Let the number of trucks be 'N'
1) Trucks on interstate highway N'= 76% of N =0.76N
2) Truck on intra-state highway N''= 24% of N = 0.24N
i) Number of trucks flagged on intrastate highway = 3.4% of N'' =![\frac{3.4}{100}\times 0.24N=0.00816N](/tpl/images/0256/0810/a5a9f.png)
ii) Number of trucks flagged on interstate highway = 0.7% of N' =![\frac{0.7}{100}\times 0.76N=0.00532N](/tpl/images/0256/0810/694ff.png)
Part a)
The probability that the truck is an interstate truck and is not flagged for safety is![P(E)=P_{1}\times (1-P_{2})](/tpl/images/0256/0810/f81c7.png)
where
Ответ: