Question

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 Correct Answer Incorrect Answer
B 28 Correct Answer Incorrect Answer
C 66 Correct Answer Incorrect Answer
D 39 Correct Answer Incorrect Answer
E 38 Correct Answer Incorrect Answer

Solution

The number of ways of selecting n samples from a population containing n items is N Cn . The population is N = 8 and sample size is n = 2. Therefore the number of possible samples are 8 C2  = 28.

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