SOLUTION: 3.In how many ways can the letters in the word TEXAS be arranged if
a.) All the letters are used
b.) 2 are used at a time
c.) 4 are used at a time
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Probability-and-statistics
-> SOLUTION: 3.In how many ways can the letters in the word TEXAS be arranged if
a.) All the letters are used
b.) 2 are used at a time
c.) 4 are used at a time
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Question 1194338: 3.In how many ways can the letters in the word TEXAS be arranged if
a.) All the letters are used
b.) 2 are used at a time
c.) 4 are used at a time Answer by ikleyn(52788) (Show Source):
(a) 5! = 5*4*3*2*1 = 120 arrangements (permutations).
(b) 5*4 = 20 2-letter words, if 2 letters are used at a time.
(c) 5*4*3*2 = 120 4-letter words, if 4 letters are used at a time.
Solved.
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Since the order is important, this problem is on PERMUTATIONS.
