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Maths-

General

Easy

Question

Of the following, which is closest to the ratio of the total number of insects in all three colonies in week 8 to the total number of insects at the time of initial treatment?

Three colonies of insects were each treated with a different pesticide over an 8-week period to test the effectiveness of the three pesticides. Colonies A, B, and C were treated with Pesticides A,B , and C, respectively. Each pesticide was applied every 2 weeks to one of the three colonies over the 8-week period. The bar graph above shows the insect counts for each of the three colonies 0,2,4,6, , and 8 weeks after the initial treatment.

2 to 5
1 to 4
3 to5
1 to 2

hint Hint:

Hint:

Here we will make approximation using bar graph and then find the answer.

The correct answer is: 2 to 5

Explanation

We have given a bar graph that represent the insect counts for each of the three colonies 0,2,4,6,8,

weeks after the initial treatment

We have to find which is closest to the ratio of the total number of insects in all three colonies in week 8 to the total number of insects at the time of initial treatment

Step 1 of 1:
Number of insect in Colony A for week 8 is 18
Number of insect in Colony B for week 8 is10
Number of insect in Colony C for week 8is 52
Therefore, the total number of insect in colonies A,B,C for week is
18+ 10+ 52 =80
Number of insect initially in colonies A,B and C are 80,62,58 respectively.
The total of all three colonies are 80+62+58+200
Thus, The ratio of the total number of insect in all three colonies for week to the ration of total number of insect initially in all three colonies will be
80 to 200
or
2 to 5
Hence, Option A is correct.

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