Step 1: Identify the sentences.
First sentence: Priya wanted to pass the examination.
Second sentence: She worked hard for that.
Step 2: Combine the sentences into a simple sentence.
In a simple sentence, we can combine both ideas using a coordinating conjunction like "and."
Simple sentence: Priya wanted to pass the examination and worked hard for that.
Final Answer: \[ \boxed{\text{Priya wanted to pass the examination and worked hard for that.}} \]