How much rice of ₹4 per kg should be mixed with 15 kg of rice of ₹10 per kg to make a mixture worth ₹6.50 per kg?

Question

How much rice of ₹4 per kg should be mixed with 15 kg of rice of ₹10 per kg to make a mixture worth ₹6.50 per kg?

Options

A.

15 kg

B.

21 kg

C.

30 kg

D.

40 kg

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