Of 200 households in a Rajkot society, 28 have neither a fridge nor a cooler. The note gives the totals. How many households have both?

Households with at least one $=200-28=172$. Fridge + cooler $=150+96=246$ counts the both-group twice, so both $=246-172=74$. 46 forgets the 28 with neither, 172 is the at-least-one count, and 76 is fridge only $150-74$.