What is the probability of guessing the answers?

M

Mikhail Shatilov2013-12-20 10:59:22

Mathematics

Mikhail Shatilov, 2013-12-20 10:59:22

Recently I had to write a difficult test, it has 40 questions. Each question has 4 possible answers.
1. How many% to guess everything?
2. How many% guess 20?
It would be cool if you could also describe how it is calculated.

Reply

Answer the question

In order to leave comments, you need to log in

3 answer(s)

B

Boris Manzhela, 2013-12-20
@iproger

The probability of guessing the answer in 1 question is 0.25 (1/4)
Total probability = multiplication of all probabilities i.e. 0.25*0.25*....0.25 (total 40 times)
Result = 0.0000000000000000000000000827180612553

F

Fray, 2013-12-20
@HCADV

it would be cool if you did your homework yourself)
Google about conditional probability and the multiplication theorem ... everything is quite clear there.

P

Puma Thailand, 2013-12-20
@opium

Ah nominal terver same?