GMAT Critical Reasoning (CR) | A recent survey of all auto accident victims in Dole County

suppose in a town there are 100 people driving vehicles, 40( more than 20 %) wore seat belts , 60 did'nt.
accidents take place.... 10 result in serious cases..... 2 were wearing seat belts 8 were not.....
chances of serious accident----- for those with seat belt- 2/40 ie 5%
-------for those without seat belts- 8/60 ie 13.5 %.

hence conclusion true.....ans = A.............

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