Question: An article in The Journal of Data Science [A Statistical Analysis of Well Failures in Baltimore County (2009, Vol. 7. pp. 111-127)] provided the following

An article in The Journal of Data Science ["A Statistical Analysis of Well Failures in Baltimore County" (2009, Vol. 7.

pp. 111-127)] provided the following table of well failures for different geological formation groups in Baltimore County. Wells Geological Formation Group Failed Total Gneiss 170 1685 Granite 2 28 Loch raven schist 443 3733 Mafic 14 363 Marble 29 309 Prettyboy schist 60 1403 Other schists Serpentine 46 w & 1 933 3 39 Let A denote the event that the geological formation has more than 1000 wells and let B denote the event that a well failed. Determine the number of wells in each of the following events.

(a) 48

(b)

(c) AUB

(d) AUB (e)

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