Suppose that we require a random sample of 5 from the letters of the English alphabet:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z.

First number the 26 objects in the population. Then use the random pairs of digits below to choose the 5 letters; start at the beginning of the list; i.e. 15 is the first number which is in the range 01-26, so the first choice is the corresponding letter. Could you use this set of numbers to choose a random sample of 10 letters?

86 40 15 31 81 78 91 30 22 58 64 12 39 65 37 93 76 46 11 09 56 28 94 54 10