the january nights

Why are clear nights colder than cloudy nights ?

Amitabh,s average expenditure for the january to june isa ₹4200 and he spends ₹1200 in january and ₹1500 in july.The average expenditure for the months of february to july is:

Statement/ : I. Some dawns are nights./ II. No night is a noon. III. No dawn is a dusk. Conclusion/ : I. Some dusks are nights. II. Some noons are dawns.

The average expenditure of Sarvesh for the January to June is Rs. 4200 and the spents Rs. 1200 in January and Rs. 1500 in July. The average expenditure for the months of February to July is :