Question

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

Answer 1

First box: 35 Negative Result

Second box : 60 Positive Result

Explanation:

Contains organic matter

Sample size : 700

95% positive means
`(95)/(100) * 700 = 665\\`

5% negative means
`(5)/(100)* 700 = 35`

Does not contain organic matter

Sample size : 300

20% positive means
`(20)/(100) * 300 = 60`

80% negative means
`(80)/(100)* 300 = 240`

Answer 2

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.