hosfordkenya4

20.11.2019 • 

Mathematics

Awater well is to be drilled in the desert where the soil is either rock, clay or sande. the probability of rock is p(r)=0.53. the clay probability is p(c)=0.21. the sand probability is p(s)=0.26. if it is rock, a geological test gives a positive result with 35% accuracy. if it is clay, a geological test gives a positive result with 48% accuracy.the test gives a positive result with 75% accuracy for sand. given the test is positive, what is the probability that soil is sand, p(sand l positive)?

Ответ:

1tzM3

10.01.2022

Mathematics

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We are asked to solve for:
P (sand | positive)
So, we solve this by:
P (sand | positive) = P (sand)  x P (positive for sand)
P (sand | positive) = 0.26 (0.75)
P (sand | positive) = 0.195

The probability is 0.195 or 19.5%.

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Ответ:

AlicR63701

22.07.2021

Mathematics

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2/3 ×2/2 = 4/6 + 1/6 =5/6 
how many more to get 6/6? 
1/6 for 1 gallon multiply by 3 (since you need 3 gallons) = 3/6 or 1/2 (when simplified)

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