Question

The total number of ways in which six' +' and four - signs can be arranged in a line such that no two -- signs occur together is (a) / 3 (b) 6 x 17 / 13 (c) 35 (d) none of these​

Answer 1

Step-by-step explanation:

Among 6′+′ there are 7 intervals 

X+X+X+X+X+X+X

Number of ways of filling 7 gaps by 4′−′=7C4=35

∴ Required ways =35