Taking the four villages together, what is the literacy rate, to one decimal place?

Kesla rate = 2,560/3,200 = 80%. Literates: 2,880 + 4,320 + 2,560 + 3,100 = 12,860. Population: 4,500 + 6,000 + 3,200 + 5,000 = 18,700. 12,860/18,700 ≈ 68.8%. (69.5% is the plain mean of the four rates.)