Question

Number of t'rigns ( =6 ) Number of - oigns = 4
[
-+-t-t+t+t
]
7 nlaces fol - sign 4 nlaces need to be selated
[
begin{aligned}
7 C_{4}=frac{71}{413 !}=& frac{7 times 6 times 5 times 4}{1 times 2 times 3 times 4}
=& 35 sqrt{24}
end{aligned}
]

# (d) None of these 39. 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) LZ/13Z (b) - 16 (17 /13) (c) 35None of these 10 If you have 5 conies of one book, 4 copies of each of

Solution