How many two element subsets of {5,6,7,8,9} are there that do not contain the elements 6,7 and 9?
Choose the most appropriate option:
A) 1 B) 2 C) 3 D) 4 E) 5
Required subsets are = {5,8}= 1   1nswer: 1
<result>A</result>
How many two element subsets of {5,6,7,8,9} are there that do not contain the elements 6,7 and 9?