Answer:
The correct answer would be option C, 24
Explanation:
24 participants will be needed by psychologists at a minimum, to perform his experiments.
This is basically a statistical question in which the possible outcomes of the minimum number of people needed for the experiment is required.
So such questions can be solved by a simple method in which we take the number of techniques and multiply them with their descending number till 1. For example in this question, the number of techniques are 4. so it would be 4! which means we can take out the minimum number of participants by 4*3*2*1, which equals 24. So 24 is the answer.
Answer:
Josephine Baker
Explanation:
He became a spy under the name Creole Goddess
The correct answer is Frederick the Wise. Although he was catholic, he supported Luther and defended him from all attacks, showing his support for reformation.
Explanation:
Brass is a metal alloy that is always made with a combination of copper and zinc. By varying the amount of copper and zinc, brass can be made harder or softer. Other metals—such as aluminum, lead, and arsenic—may be used as alloying agents to improve machinability and corrosion resistance.
