Andrei Has a glass tank first he wants to put in some marbles each of which has the volume of 0.04 L then he wants to fill the tank with water until it is completely full if he uses 50 marbles he will have to add 33 L of water if Andre has exactly 20 L of water how many marbles does he need so the tank is full?

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