A multiple choice test has four possible answers for each question. Let X be the number of correct responses in a test of 100 questions if the student simply guesses on each question. The standard deviation of X is

a. 4.33.
b. 18.75.
c. 0.433.

a. 4.33.

Step-by-step explanation:

If there is only one correct answer out of four alternatives, the expected proportion of correct answers is p =0.25

Sample size (n) = 100 questions

The standard deviation of a proportion 'p' is given by:

Applying the given data:

If X is the number of correct responses in 100 guesses, the standard deviation of X is:

The standard deviation of X is 4.33 questions.

4 candies

step-by-step explanation:

7 x 28 = 196

200 - 196 = 4 candies remaining.

answer: it's d

step-by-step explanation: