Question

Type the correct answer in each box. Use numerals instead of words.

Answer 1

Answer:

First box: 35 Negative Result

Second box : 60 Positive Result

Step-by-step explanation:

Contains organic matter

Sample size : 700

95% positive means  $\frac{95}{100} \times 700 = 665$

5% negative means $\frac{5}{100}\times 700 = 35$

Does not contain organic matter

Sample size : 300

20% positive means $\frac{20}{100} \times 300 = 60$

80% negative means $\frac{80}{100}\times 300 = 240$

Answer 2

Answer:

Just subtract the less no by greater one .you get the answer.

Positive result of sample test gives a positive result than it is 665/1000*100*=66.5% likely that the soil sample contains organic matter.