Answer:
well for the cats she can do 3 for each and dogs 2 for each
The probability of a negative result for a batch will be "0.3487".
Given values are:
Positivity rate,
Batch size,
Now,
The probability of negative result will be:
→ 
By substituting the values, we get
→ 
→ 
→ 
Thus the answer above is right.
Learn more about the probability here:
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7. Four and 7 tenths
8. Twenty two and eighty nine hundredths
9. Forty Five and Three hundred Twenty Nine Thousandths
10.Twenty seven hundredths