The number of ways in six + and 4 – signs can be arranged in the line such that no two – sign occur together is __.
A. 30
B. 35
C. 42
D. 28
Answer:B
The number of ways in six + and 4 – signs can be arranged in the line such that no two – sign occur together is __.
A. 30 B. 35 C. 42 D. 28