Answer:
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.
Answer:
Total number chocolate bars with almonds sold were approximately 66.34 and total number chocolate bars with walnuts sold were approximately 34.67.
Step-by-step explanation:
Let number chocolate bars with almonds be x
Also let number chocolate bars with walnuts be y
Given:
Number of chocolate bars with almonds that were sold one weekend was 3 less than 2 times the number of chocolate bars with walnuts.
Framing the above sentence in equation form we get;
Also given:
The number of chocolate bars with walnuts plus 4 times the number of chocolate bars with almonds was 300.
Framing the above sentence in equation form we get;
Now Substituting the value of x in above equation we get;
Now we will substitute the value of y in equation we get;
Hence, Total number chocolate bars with almonds sold were approximately 66.34 and total number chocolate bars with walnuts sold were approximately 34.67.