I'm trying to solve this question,
This is what I tried
Probability of at least 4 correct answers out of 5 questions.
A fair coin -2 probability (right or wrong)
Total of probabibities= 2^5 = 32
No of ways to get 4 questions right
5C4= 5!/ 4! (5-4)!= 5
No of ways to get 5 questions right
5C5= 1
At least 4 correct answers
5+1 = 6
So, 6/32 = 3/16
Is this correct?
Thanks
This is what I tried
Probability of at least 4 correct answers out of 5 questions.
A fair coin -2 probability (right or wrong)
Total of probabibities= 2^5 = 32
No of ways to get 4 questions right
5C4= 5!/ 4! (5-4)!= 5
No of ways to get 5 questions right
5C5= 1
At least 4 correct answers
5+1 = 6
So, 6/32 = 3/16
Is this correct?
Thanks