Find the probability. Enter your answer as a simplified fraction.Picking a purple marble from a jar with 7 green and 7 purple ma
2 answers:
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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: x=-6
Step-by-step explanation:
Let's solve your equation step-by-step.
2(9−x)=3(x+16)
Step 1: Simplify both sides of the equation by distribution
Step 2: Subtract 3x from both sides.
Step 3: Subtract 18 from both sides.
Step 4: Divide both sides by -5.