Question

Please give me a good explaination.

15 Two cubes with sides numbered 1 through 6 were rolled 20 times. Their sums are recorded in the table below 12 10 10 What is the empirical probability of rolling a sum of 9? (1) 스 20 (2) 5 으 36 (4) 16 what is the vertex of the graph of the equation y = 3r2 + 6r + 1? (2) (-1,10) 17 The length and width of 0.1 ectangle are 48 inches and 40 inches. To the nearest inch, what is the length of its diagonalP 2) 62 (4) 90

Answer 1

Probability of rolling a sum of 9 = Number of outcomes is 9/ Total number of all out comes No. of outcomes of 9 = 5 Total number of all outcomes = 2 Therefore 5/20 (option (2)) is correct