Answer:
252/1024
Step-by-step explanation:
There are two possible answer choices for each question, meaning that there is a total of 2^10=1024 possible true-false combinations. There are [tex]{ 10 \choose 5 }= 252[/tex] possible ways to choose the 5 out of 10 to be correct. There is thus a 252/1024 chance to get exactly five correctly.
