In what ratio must a supplier mix two varieties of pulses costing ₹10 per kg and ₹30 per kg, respectively, so as to get a mixture worth ₹15 per kg?

3 : 1 4 : 5 2 : 3 1 : 2

3 : 1

⇒ Ratio a supplier mix should have for two varieties of pulses costing Rs.10 per kg and Rs.30 per kg, respectively, so as to get a mixture worth Rs.15 per kg = 15 : 5 = 3 : 1.