Question

A clinical test on humans of a new drug is normally done in three phases. Phase I is conducted with a relalively small number of heallhy volunteers. For example, a phase I test of a specific drug involved only 5 subjects. Assume that we want lo treal 5 heallhy humans with this new drug and we have 8 suitable volunteers available. Complete parts (a) through (c) below. a. If the subjects are selecled and troaled in soquence, so that the Irial is discontinuod if anyone displays adverse effects, how many different sequential arrangements are possible if 5 people are selected from the 8 that are available? Choose the correct answer bolow. A. 40,320 B. 56 C. 6,720 D. 120

Answer 1

The correct answer is B. 56.

Step-by-step explanation:

To calculate the number of different sequential arrangements possible when selecting 5 people from a pool of 8 available volunteers, we can use the concept of combinations.

The number of different sequential arrangements can be calculated using the formula for combinations, which is denoted as "nCk" or "n choose k," where n is the total number of available volunteers and k is the number of volunteers to be selected.

In this case, we want to select 5 volunteers from a pool of 8, so the calculation is:

8C5 = 8! / (5! * (8-5)!) = (8 * 7 * 6) / (3 * 2 * 1) = 56