Dr. Anderson found that 18 out of 30 children in the village tested positive for chicken pox. At this rate, how many would test

Question

3 years ago

9

negative if there were 70 children in the village as a whole

1 answer:

Artist 52 [7] · Answer 1 · 2022-05-08T21:58:23+03:00

Answer:number of children negative for chicken pox=28

Step-by-step explanation:

Number of children positive for chicken pox =18 out of 30

Therefore number of children negative for chicken pox is 12 out of 30 ie ( 30-18)

Such that the ratio of positive tested chicken pox children to negative tested chicken pox children =18:12

Therefore total ratio =18 +12=30

Suppose there are 70 children,then number of children negative for chicken pox =

12/30 x 70 =28