shirini2
Forum Senior
Topics: 27
Posts: 86
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In a classroom of 25 students (15 males and 10 females), 5 males develop hepatitis A over a 2-week period. During the next 6 weeks, an additional 3 males and 2 females develop the infection. The attack rate of hepatitis A in this classroom is
1) 25%
2) 30%
3) 35%
4) 40%
5) 45%
Is it 40 %
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| neuroblastoma
Forum Guru
Topics: 109
Posts: 1,091
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5male +3 male+2 male-- 10 people
10/ 25 X 100= 40%
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| robin082006
Forum Hero
Topics: 471
Posts: 5,123
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ok
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The Key to Succeed is Patience.
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| shirini2
Forum Senior
Topics: 27
Posts: 86
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Thank you
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| Ivonne
Find a way or make one
Topics: 58
Posts: 1,654
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Similar as incidence  sounds easy
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| fail
Forum Newbie
Topics: 4
Posts: 8
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i think it is a,,,,,,
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| sfk
Forum Elite
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Posts: 300
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i think its 25%. coz 3+2=5 students got the disease, and only 20 were susceptible. ( excluding the 5 who initially had the disease)
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| laura81
Forum Elite
Topics: 32
Posts: 176
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i agree with sfk..i think its 25%
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| docofthebigapple
Forum Senior
Topics: 25
Posts: 185
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from the beginning of the class to the moment we stopped & noticed. 10 people in total had disease out of 25. So calculation is 40%.
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