Answer:
A. The Fabric
Step-by-step explanation:
By definition and experimental unit is the entity which is subjected to different types of treatments during the experiment.
Here the fabric has been stained with different types of stains and and then have been treated with baking soda and bleach under different temperature environments. In the experiment each time the fabric has been given different treatment than the previous one. That's why the fabric is experimental unit in the experiment mentioned in the question.
<span>There are 4 suit ,, hearts , Diamonds , clubs , Spades
then the 3 cards may be from the 1st OR 2nd OR 3rd OR 4th
<span>p(A)=4*(13C3)/(52C3)=0.0517 Or 5.17%
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span></span>
