Using it's concept, it is found that the mean number of raisins is of 7.
What is the mean?
The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.
In this problem, there are 6 observations: 5, 9, 5, 5, 7, 11.
Hence, the mean is:
[tex]E(X) = \frac{5 + 9 + 5 + 5 + 7 + 11}{6} = 7[/tex]
More can be learned about the mean concept at https://brainly.com/question/25122507
