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    (Original post by SG22)
    If Pij = the production of product i in period j, then to indicate that the limit on production of the company's three products in period 2 is 400,

    a. P21 + P22 + P23 < 400
    b. P12 + P22 + P32 < 400
    c. P32 < 400
    d. P23 < 400
    Well I'm a bit unfamiliar with this stuff, but if "the limit on production of the company's three products in period 2 is 400," then that looks like the sum of all the Pij values for i ( the product no) from 1 to 3 and j=2 (the period 2). i.e.

    P12 + P22 + P32 < 400
Do you think parents should charge rent?
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