The electric company charge: Tk. 0.30 per kilowatt hour (KWH). Rahim used 2800 KWH in April, 3200 KWH in May, and 3600 KWH in June. What was his average costs of electricity for the 3 months?
Explanation: average consumption = \(\frac{2800+3200+3600}{3}=3200\) (৩টির মধ্যে difference সমান; তাই divide না করে ও 3200 assume করা যায়) Total cost = \(3200 \times Tk. 0.30 = Tk. 960\) (answer choice এ 96 আছে, কিন্তু 960 নেই)।]
