A quiz consists of 40 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers? Round to the nearest thousandth.

8 and 2.529

Step-by-step explanation:

The computation of the mean and the standard deviation is shown below:

Given that

Total number of questions is n =  40

The Probability of correct answer is p =  

So, the probability of the wrong answer is q =   =

Moreover, this is the binomial distribution

Based on the above information

The mean is

= 8

Now the variance is

=

So, the standard deviation is

= 2.529

hence, the mean and the standard deviation is 8 and 2.529 respectively

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.

think about it deeply and passionately about this property

i am sorry