Anumber cube is rolled 450 times. the number 3 comes up 67 times. a. what is the theoretical probability of rolling a 3? write your answer as a fraction in simplest form. b. what is the experimental probability of rolling a 3? write your answer as a fraction in simplest form.

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?