Question

25 mice were involved in a biology experiment involving exposure to chemicals found in ciggarette smoke. developed at least tumor, 9 suffered re[iratory failure, and 4 suffered from tumors and had respiratory failure. A) how many only got tumors? B) how many didn't get a tumor? C) how many suffered from at least one of these effects?

Answer 1

Step-by-step explanation:

The total number of mice for the experiment is

`Universalset=25`

How to know how many mice didn't have a tumor?

Identify the total mice who did not have any effects or the effects did not include a tumor.

The number of mice that had respiratory failur is

`n(R)=9`

Based on this, it can be concluded 9 mice did not have a tumor,

Hence,

The number of mice that didnt have a tumor is 9

To figure out the number that got only tutmor, we will consider the number that has both tumors and respiratory failure

`n(T\cap R)=4`

The number that developed tumors is given below as

`n(T)=15`

Hence,

The number that got