Anumber cube is rolled 310 times the results are: 51 ones,56 twos,45 threes,54 fours,53 gives, and 51 sixes. what is the probability of rolling even number?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .