Which of the symbols should replace the question mark in the given expression in order to make the expressions P>A as well as T<=L definitely true ? P>L?A>=N=T.

You gave the answer as L>=A.
I can't understand. L could be either less or greater or equal to A.
How it should be only greater than A ????

Hi,
The question says to replace ? with a symbol that makes both of the condition true. Suppose you replace ? with >= making the expression P>L>=A>=N=T.
This clearly makes P>A since P>L. The only case that is worth checking for the second condition is the case when, T=N=A=L, still making the expression T<=L true.