Audrey has a bag of similar-sized red and green grapes. there are 12 red grapes and 13 green grapes in the bag. if the first 7 grapes she ate were green what is the probability that the 8th grape she eats is green and the 9th grape she eats is red?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

1. are the triangles similar and if so why? what is the value of x? show your work.

Which one ? is the answer and how to find this answer