Q.11) Consider a long list of numbers such that: 15% of the entries are 1; 50% of the entries are 1; 10% of the entries are 10; The rest of the entries are 0. a.) If I pick an entry from this list at...

Q.11)

Consider a long list of numbers such that:
15% of the entries are 1;
50% of the entries are 1;
10% of the entries are 10;
The rest of the entries are 0.

a.) If I pick an entry from this list at random, what is
the expected value of the number I get?