GRE
Exam
Numerical Ability
Permutation and Combination
How many different ways can the letters in the word STUDY be ordered?
Read Solution (Total 4)
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- 5! = 120
- 14 years agoHelpfull: Yes(2) No(0)
- 120
- 14 years agoHelpfull: Yes(2) No(0)
- The letters in the word STUDY can be ordered in 5! ways. in 120 ways
- 14 years agoHelpfull: Yes(2) No(0)
- first place can be filled in 5 ways either s,t,u,d or y..
then next place in 4 ways as 1 letter already used...then 3,2 then 1...5*4*3*2*1=120 - 11 years agoHelpfull: Yes(1) No(0)
GRE Other Question
The ages, in years, of the employees in a small company are 22, 33, 21, 28,
22, 31, 44, and 19.
(a) Find the mean, median, and mode for the 8 ages.
(b) Find the range and standard deviation for the 8 ages.
(c) If each of the employees had been 10 years older, what would have been
the range and standard deviation of their ages?
Martha invited 4 friends to go with her to the movies. There are 120 different
ways in which they can sit together in a row. In how many of those ways is
Martha sitting in the middle?