_______16. What is C(25, 1)? A. 25! b. 25 c. 1 d. 0
_______17. Which of the following formula is used in finding the number of permutations of n objects taken r at a time?
P=n!r! b. P=n!(n-r)! c. P=n!r!n-r! d. P=n!r!(n-r)
_______18. Which of the following formula is used in finding the number of combinations of n objects taken r at a time?
C=n!r! b. C=n!(n-r)! c. C=n!r!n-r! d. C=n!r!(n-r)
________19. Which of the following illustrates combination.
Arranging the letters of the word STATISTICS
Selecting 3 out of 5 available fruits for a salad
Forming 2-digit numbers from the given digits
None of these
_________20. How does permutation differ from combination?
Permutation is more difficult than combination.
Permutation involves arrangement of objects while combination is merely selection.
Combination involves arrangement of objects while permutation is merely selection.
Combination and permutation are the same.​