This is the 7353rd most frequent Chinese word.
與否
"與否" means "whether or not."
與否 is used here to indicate a binary state (success or failure) as part of the subject matter of the sentence.
這件事的成功與否取決於大家的努力。
The success or failure of this matter depends on everyone's effort.
與否 is utilized in this sentence to express a condition (sufficient or insufficient preparation) affecting the outcome.
考試是否過關取決於你的準備充分與否。
Whether you pass the exam depends on how well prepared you are.
與否 is employed here to articulate a conditional scenario regarding the feasibility of participation based on time allowance.