Q's on Probability & PC
Two couples & a single person are settled at random in a row of five chairs. What is the probability that neither of the couples sits together in adjacent chairs?
A. 1/5
B. 1/4
C. 3/8
D. 2/5
E. 1/2
Out of the 7 models, all of different heights, five models will be chosen to pose for a photograph. If the five models are to stand in a line from shortest to tallest, and the fourth tallest models & sixth tallest cannot be adjacent, how many different arrangements of five models are possible?
A. 6
B. 11
C. 17
D. 72
E. 210
Can someone please help me on this.
I really appreciate it -
Thanks!
Two couples & a single person are settled at random in a row of five chairs. What is the probability that neither of the couples sits together in adjacent chairs?
A. 1/5
B. 1/4
C. 3/8
D. 2/5
E. 1/2
Out of the 7 models, all of different heights, five models will be chosen to pose for a photograph. If the five models are to stand in a line from shortest to tallest, and the fourth tallest models & sixth tallest cannot be adjacent, how many different arrangements of five models are possible?
A. 6
B. 11
C. 17
D. 72
E. 210
Can someone please help me on this.
I really appreciate it -
Thanks!
