
Practice Examples 
_{
}5. How many different 5letter arrangements are there of the letters in the word
digit ? (Answer) 
6. If a
three digit number is formed from the digits
1,2,3,4,5,6, and 7, with
no repetitions, tell how many of these three digit numbers will have a number value between 100 and 500. (Answer) 
7. If the letters in the word
TRIANGLE are rearranged at
random, find the probability that the first letter is an A. (Answer) 
8. Two cards are drawn at
random from a standard deck of 52 cards, without replacement. What is the probability of drawing a 7 and a king in that order? (Answer) 
9. Throughout history, many people have contributed to
the development
of mathematics. These mathematicians include Pythagoras, Euclid, Hypatia, Euler, Einstein, Agnesi, Fibonacci, and Pascal. What is the probability that a mathematician’s name selected at random from those listed will start with either the letter E or the letter A?



