A total of 40 different proposals were evaluated by the IRAD (Industrial Research and Development) committee during the past year. Twenty were funded. Their rate of return estimates are summarized with the i* values rounded to the nearest integer. For the accepted proposals, calculate the expected rate of return E (i).

Proposal                 Number of

ROR, i *%                Proposals

_8 ........................           1

_5 ........................           1

0 .........................            5

5 .........................            5

8 .........................            2

10........................            3

15 .......................            3

                                       20