Question

PLEASE HELP PLEASE PLEASE!! <3

1. If two thirds of all type-Z organisms are red and seven-eighths of all type-Z organisms are green, what is the number of type-Z organisms that are red out of a sample population of 1,915? Round to nearest whole number.
A.2873
B.2383
C.1277
D.1727

2.If 82 out of 100 cockroaches are immune to a pesticide after repeated use in area, how many would be expected to be immune in a population of 2.2 million?
A. 8,200,000
B.1,804,000
C.1,640,000
D.1,750,000

Answer 1

1. 1277
2. 1,804,000
Hope this helps!

Answer 2

C.1277

B.1,804,000

Explanation:

1.

Two thirds of all type-Z organisms are red.

So, out of 1915, the type-Z organisms that are red will be :

`(2)/(3)*1915= 1276.67`

So, answer is 1277.

2.

Number of cockroaches expected to be immune in a population of 2.2 million are :

82% of 2.2 million

`0.82*2.2million= 1804000`

Answer is :B. 1,804,000