Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are possible?
A)20
B)7
C)5!
D)10

Question

Quizplus · Accepted Answer

The number of ways to choose 2 letters out of 5 is given by the combination formula C(n, k) = n! / (k!(n-k)!), where n is the total number of items to choose from, and k is the number of items to choose. Here, C(5, 2) = 5! / (2!(5-2)!) = 10.

Of Five Letters (A, B, C, D, and E), Two