Answer:
I think it is A.
Step-by-step explanation:
If 4 are $2.00 , then x3 to get 12 light bulbs and 2x3=6 so it's $6.00
You most likely will win a token. you have the advantage as the most they can win is 1 token if you lose, but you can win 3 tokens.
Answer:33 1/3%
Step-by-step explanation:
Answer:
b) 95%
Step-by-step explanation:
We have been given that scores on an approximately bell shaped distribution with a mean of 76.4 and a standard deviation of 6.1 points. We are asked to find the percentage of the data that is between 64.2 points and 88.6 points.
First of all, we will find z-scores of each data point as:




Let us find z-score corresponding to normal score 88.6.



To find the percentage of the data is between 64.2 points and 88.6 points, we need to find area under a normal distribution curve that lie within two standard deviation of mean.
The empirical rule of normal distribution states that approximately 95% of data points fall within two standard deviation of mean, therefore, option 'b' is the correct choice.