The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces, and 5 on one face
Hi Nancy
Please check Ex 13.4, 16 of Chapter 13 Class 12 Probability here https://www.teachoo.com/4124/766/Ex-13.4--16---Mean-numbers-obtained-on-throwing-a-die/category/Ex-13.4/