10. Census data for Prenland show that unmarried Prenlandic men in their thirties outnumber unmarried Prenlandic women in that age group by about ten to One. Most of these men do wish to marry. Clearly, however, unless many of them marry women who are not Prenlandic, all but a minority will remain unmarried. The argument makes which of the following assump- tions?
Emigration from Preland is more common among women than among men.
A greater proportion of Prelandic women in their thirties than of Prenlandic men of the same age would prefer to remain unmarried.
It is unlikely that many of these unmarried Prenlandic men will marry women more than a few years older than themselves.
Prenland has a high rate of divorce.
Most of the unmarried Prenlandic men are unwilling to marry women who are not Prenlandic.
11.Certain extremely harmful bacteria found only in sewage are difficult to detect directly. Testing forE. coli, an easily detected and less harmful type of bacteria, in ocean water would be a reliable way of determining whether or not these more harmful bac- teria are present, since ocean water contains E. Coli only if the water is contaminated with sewage that contains the harmful bacteria. Which of the following, if true, most seriously weakens the argument?
There are many different strains of the E. coli bacteria, and only some of these strains are harmful.
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