Question
The average cost of two chairs is Rs. 15000. The average
cost decrease by 30% when one more chair is included. What is the cost price of the 3 rd chair?Solution
Total cost of two chairs = 15000 × 2 = Rs. 30000 Average cost of all the three chairs = 15000 × (70/100) = Rs. 10500 Total cost of all the three chairs = 10500 × 3 = Rs. 31500 Cost of the 3rd chair = 31500 - 30000 = Rs. 1500
If both the equations I and II given below are added, then find the product of roots of newly formed equation.
I: 3x2 + 9x + 5
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