How many ways can the letters in the word BOOKKEEPER be arranged? please show work
Seven swimmers compete in the championship freestyle 50m race. How many ways can first, second, and third place prizes be awarded? please show your set-up.
If you spin this spinner three times, what is the probability of getting a number less than 4 each time? Are these events dependent or independent?
please help?
2017-05-18 4:43 am
回答 (2)
2017-05-18 7:53 am
Bookkeeper: 10!/(2!2!3!) = 10!/4!
Swimmers: 7*6*5 = 210
What spinner?
Yes, they're independent.
Swimmers: 7*6*5 = 210
What spinner?
Yes, they're independent.
2017-05-18 4:46 am
BOOKKEEPER
By writing the letters in alphabetical order (BEEEKKOOPR) we can see that there are 10 letters including 3 E's, 2 K's, and 2 O's. So the answer is 10! / (3! * 2! * 2!) = 151,200
By writing the letters in alphabetical order (BEEEKKOOPR) we can see that there are 10 letters including 3 E's, 2 K's, and 2 O's. So the answer is 10! / (3! * 2! * 2!) = 151,200
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