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Number of packages of snack sold on Monday = 120 Number of packages of snack sold on Tuesday = 120 – 30 = 70 Number of packages of snack sold on Wednesday = 120 + 25 = 145 Therefore, his total income of 3 days = (120 + 90 + 145) × 12 = 355 × 12 = Rs. 4260 Therefore, savings of person in given 3 days = 0.3 × 4260 = Rs. 684
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