So the number of ways of choosing two distinct letters at a time is (42)=6. We can then add the duplicate pairs which are O,O and N,N to give a total of 8 possible pairs.
Step-by-step explanation: take 86 and subtract 2 wich gives you 84. then, take 84 and divide it by 3. 84 divided by three is 28. so, beth has 28 friends.