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Explanation:

From (4): Let Tohri visit x houses on day 1, hence he visits (x + 30) houses on day 2.
⇒ Total houses visited in 2 days = 2x + 30

Let Tohri visit n houses on day 2, hence he visits (100 – n) houses on day 1.

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From (1) & (2): Lahur visited half the total houses on both days = x + 15
From (2): Lahur sold half the products on each day = 50

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From (1) & (3): Hokli sold all 100 items on day 1, while he visited only 1 house on day 2.
Hence he visited (2x + 29) houses on day 1.

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From (5): 100-nx = 250x+15

⇒ 100x + 1500 – nx – 15x = 100x
⇒ nx + 15x = 1500

⇒ n = 1500x+15     ...(1)

From (5): nx+30 = 3450x+15

⇒ 4nx + 60n = 150x + 4500

⇒ 4x × 1500x+15 + 60 × 1500x+15= 150x + 4500

⇒ 4x × 10x+15 + 60 × 10x+15 = x + 30

⇒ 40x + 600 = (x + 15)(x + 30)

⇒ 40x + 600 = x2 + 45x + 450

⇒ x2 + 5x - 150 = 0

⇒ (x + 15)(x - 10) = 0

⇒ x = 10 (-15 is rejected)

From (1)

⇒ n = 1500x+15 = 60

∴ The table can be filled as follows:

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∴ Total number of households met by Tohri, Hokli and Lahur on the first day = 10 + 49 + 25 = 84.

Hence, 84.

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