Question 18
Sami has many black and white beads, with beads of the same colour identical. How many ways can he arrange any seven beads in a row so that no two black beads are adjacent?
Original options (preserved):
A. 7
B. 14
C. 24
D. 33
E. 36
Editorial note: retain the original wording and options, but explain the count and any missing condition rather than forcing a listed key. The rubric is an editorial proposal.
Original options (preserved):
A. 7
B. 14
C. 24
D. 33
E. 36
Editorial note: retain the original wording and options, but explain the count and any missing condition rather than forcing a listed key. The rubric is an editorial proposal.