Find the number of all possible samples from a population containing 8 items from which 2 items are selected at random without replacement.
A. 56
B. 28
C. 66
D. 38
Answer:B
Find the number of all possible samples from a population containing 8 items from which 2 items are selected at random without replacement.
A. 56 B. 28 C. 66 D. 38
Explanation: The number of ways of selecting n samples from a population containing n items is NCn. The population is N = 8 and sample size is n = 2. Therefore the number of possible samples are 8C2 = 28.