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Question: an article in the journal of data science quota statistical...

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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
Gnesis 170 1685
Granite 2 28
Loch raven schist 443 3733
Mafic 14 363
Marble 29 309
Prettyboy schist 60 1403
Other schists 46 933
Serpentine 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) A and B

(b) A'

(c) A or B

(d) A or B'

(e) A' and B'

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