A manufacturer of flash drives for data storage operates a production facility that runs on three 8-hour shifts per day.The following contingency table shows the number of flash drives that were defective and not defective from each shift. 
The expected number of not defective flash drives manufactured between 3 p.m.and 11 p.m.is ______.
Definitions:
Annuity
A financial instrument that provides a consistent flow of payments to a person, mainly serving as a source of income for people in retirement.
Equal Cash Flow
A scenario in which cash inflows or outflows are the same in each period.
Internal Rate of Return Method
A capital budgeting method that calculates the return on investment by setting the net present value of cash flows equal to zero.
Present Value
Today's worth of a forthcoming sum of money or series of cash payments, considering a designated rate of return.
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