Brain Teaser's / Riddels. Number 28

1] There’s a town in Ontario where 5% of all the people living there have unlisted phone numbers. If you selected 100 names at random from the town's phone directory, on average, how many of these people would have unlisted phone numbers?     Pick the tomato, get the answer!

2] A quick test of intelligence.

There are no Tricks to the test. Read this sentence:

FINISHED FILES ARE THE RE-
SULT OF YEARS OF SCIENTIF-
IC STUDY COMBINED WITH THE EXPERIENCE OF YEARS.

Now count the F's in the sentence. Important, count them ONLY ONCE: How many F’s are there?    

1] None. The phone book doesn't list the names of people with unpublished numbers.

2] One of average intelligence finds three of them. If you spotted four, you're above average. If you got five, you can turn your nose at most anybody. If you caught six, you are a genius. There is no catch. Many people forget the "OF"'s. The human brain tends to see them as V's and not F's.