Question

There are 260 persons with a skin disorder. If 150 had been exposed to the chemical A, 74 to the chemical B, and 36 to both chemicals A and B, find the number of persons exposed to
i) Chemical A but not Chemical B
ii) Chemical B but not Chemical A
iii) Chemical A or Chemical B

Answer 1

Answer:

(i) 114 (ii) 38 (iii) 152

Step-by-step explanation:

Find the number of persons that are exposed to Chemical A but not Chemical B:

Number of persons = 150 - 36 = 114

Find the number of persons that are exposed to Chemical B but not Chemical A:

Number of persons = 74 - 36 = 38

Find the number of persons that are exposed to Chemical A or Chemical A:

Number of persons = 114 + 38 = 152

Answer: (i) 114 (ii) 38 (iii) 152

Answer 2

Answer:

Step-by-step explanation:

(i) 114 (ii) 38 (iii) 152

Step-by-step explanation:

Find the number of persons that are exposed to Chemical A but not Chemical B:

Number of persons = 150 - 36 = 114

Find the number of persons that are exposed to Chemical B but not Chemical A:

Number of persons = 74 - 36 = 38

Find the number of persons that are exposed to Chemical A or Chemical A:

Number of persons = 114 + 38 = 152

Answer: (i) 114 (ii) 38 (iii) 152