Answer:
If the exam has 10 questions, the probability will be 0,0078
Step-by-step explanation:
To get the probability equally likely of having the question right we use the following formula
P=# of possibilities that meet the condition / #of equally likely possibilities.
Each question has the following probability of being right.
P=1/2
In this case, we considered 10 questions as the total exam. So, we have to get 7 questions right to pass the exam (70%).
To get the probability of several independent events occurring together, we just multiply the probability of the all the events.
P(passing the exam)=1/2*1/2*1/2*1/2*1/2*1/2*1/2=0,0078
