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practice503
Asked: October 23, 20222022-10-23T20:18:27+05:30 2022-10-23T20:18:27+05:30In: Data Structure

Solve using fractional knapsack: M=20, n=4 P= (3, 10, 15, …

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Solve using fractional knapsack:

M=20, n=4

P= (3, 10, 15, 5)

W= (5, 13, 12, 8).

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    1. 58n25709
      2023-01-30T10:13:59+05:30Added an answer on January 30, 2023 at 10:13 am

      The fractional knapsack problem involves selecting items to fill a knapsack of limited capacity (M=20 in this case) in such a way as to maximize the total value.

      Here’s how to solve it:

      1. Sort the items in decreasing order of their value per unit weight (i.e. Pi/Wi).
        • Item 1: 3/5 = 0.6
        • Item 2: 10/13 = 0.769
        • Item 3: 15/12 = 1.25
        • Item 4: 5/8 = 0.625
      2. Take the items in the order of the sorted list until the knapsack is full. If a complete item cannot fit, take a fraction of it.
        • Item 3 (15/12) can fit completely, so add it to the knapsack and reduce the capacity to 20-12=8.
        • Item 2 (10/13) can fit completely, so add it to the knapsack and reduce the capacity to 8-13= -5.
        • Item 1 (3/5) cannot fit completely, so add 3/5 of it to the knapsack and reduce the capacity to 0.
        • Item 4 (5/8) is not considered since the knapsack is full.
      3. The total value of the items in the knapsack is 15 + 10 + (3/5)*3 = 22.

      So the optimal solution is to choose items 3, 2 and a fraction of item 1, with a total value of 22.

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