Frankly I do not know why he did not consider x

However, if you pick numbers you can reach the same solution

How so Carcass? because if we add we'll get 0<x+y+z<3 = x+y+z but we don't have that in the option

I do not know how you get , summing the inequality, the three

E is the only option that is positive. Even because y is negative and z is positive but certainly z > y

Pls can you solve the question by steps? I don't seem to understand

x is positive and a fraction such as 1/2

y is negative and a fraction such as -1/2

z is a positive fraction such as 1.5 or 3/2

All the answer choices but E are negative or positive it depends on their value

In E even if you take a value for y really close to -1 and in z a value really close to 1 I.E a minimum and a maximum value the result will be always positive