How many 5 letter words ( with or without meaning) can be formed using all the following 5 letters P,U,R,S,and T so that letter P is to the left of letter R?  Choose the correct choice from the following
A) 60
B) 30
C) 90
D) 120
E) 75
Two positions can be selected out of 5 positions in 5C2 ways = 10 ways.   And the remaining 3 letters can be placed in 3 posions in 3! Ways = 6 ways.   So the final 60nswer = number of ways letters P and R can be arranged x number   of ways the other 3 letters can be arranged   Final 60nswer = 10 x 6 = 60 ways   60
<result>A</result>
How many 5 letter words ( with or without meaning) can be formed using all the following 5 letters P,U,R,S,and T so that letter P is to the left of letter R?