Multiple choice

(\text{How much tea at Rs. 9 per kg must be mixed with 100 kg of superior tea at Rs. 13.50 per kg to give an average price of Rs. 11 per kg?})

  1. 85 kg

  2. 120 kg

  3. 125 kg

  4. 130 kg
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let x kg of Rs. 9 tea be mixed with 100 kg of Rs. 13.50 tea. Using mixture formula: (9x + 13.50*100)/(x + 100) = 11. Solving: 9x + 1350 = 11x + 1100, so 2x = 250 and x = 125 kg. Option A (85 kg) would give average price around Rs. 12. Option B (120 kg) gives approximately Rs. 11.07, and Option D (130 kg) gives approximately Rs. 10.87, neither equal to Rs. 11.

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