20,000 children in Pangaea were randomly surveyed as to the number of different vegetables they like to eat. The results are above but arent...

20,000 children in Pangaea were randomly surveyed as to the number of different vegetables they like to eat. The results are above but arent completer and are used as theoretical probabilities. X = the number of different vegetables Pangaean children like to eat. how would I find:

 a.  expected value E(X). 

 b.  population mean μ

 c.  population standard deviation σ