Some of the CDs produced by a manufacturer are defective. From the production line, 5 CDs are selected and inspected. How many sample points exist in this experiment?
A)10
B)25
C)30
D)32

Question

Quizplus · Accepted Answer

This is a combination problem, and we need to use the formula nCr = n! / r!(n-r)!, where n is the total number of CDs produced, and r is the number of CDs selected for inspection. In this case, n = infinity (since we don't know how many CDs were produced), and r = 5. Therefore, we can calculate: infinityC5 = infinity! / 5!(infinity-5)! = (5*4*3*2*1) / 5!(infinity-5)! = 32. So there are 32 sample points in this experiment, and the answer is D.

Some of the CDs Produced by a Manufacturer Are Defective