Discussion

Explanation:

Total annual expenditure of the family = 4 × 13750 + 3 × 11750 + 5 × 31750 = 2,49,000

Annual savings of the family = Rs. 15,550

∴ Total annual income of the family = 2,49,000 + 15,550 = Rs. 2,64,550

⇒ Average monthly income = 2,64,550/12 = Rs. 22,045

Hence, option (b).

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