A $20 bill two $10 bills three $5 bills and four $1 bills are placed in a bag. I know the expected value is 5.90 but how do I find the standard deviation of the amount chosen

The triangles are similar. what is the value of x? show your work.

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

The correlation coefficient between the number of students and marks obtained in end semester exam. (13 marks) give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 marks) draw the number of students and marks obtained in end semester exam scatter diagram c. (4 marks) check list write your name and id corectly write the question number properly use your own calculator. show all the steps to solve the problems. use the correct formula. answer in provided time. don't use your mobile for any purpose. write your answer up to two decimal places