1,600 persons in a locality exposed to small- pox, 300 in all were attacked. nated and of these only 30 were attacked. Can vaccination be re- Of 1,600 persons 400 had been vacci- parded as a preventive measure for small-pox?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 30E
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OR
on 21.8. Of 1,600 persons in a locality exposed to small-
pox, 300 in all w'ere attacked. Of 1,600 persons 400 had been vacci-
nated and of these only 30 were attacked. Can vaccination be re-
garded as a preventive measure for small-pox?
Transcribed Image Text:OR on 21.8. Of 1,600 persons in a locality exposed to small- pox, 300 in all w'ere attacked. Of 1,600 persons 400 had been vacci- nated and of these only 30 were attacked. Can vaccination be re- garded as a preventive measure for small-pox?
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