Question
The average cost of three chairs is Rs.12000. The
average cost decrease by 15% when one more chair is included. What is the cost price of the 4th chair?Solution
Total cost of three chairs = 12000 × 3 = Rs. 36000 Average cost of all the four chairs = 12000 × (85/100) = Rs. 10200 Total cost of all the four chairs = 10200 × 4 = Rs. 40800 Cost of the 3rd chair = 40800 - 36000 = Rs. 4800
More ESIC Part B Questions
- What will come in place of (?), in the given number series.
1, 4, 9, 16, ?, 36 {(12√5 + 6√5 )} ×{(10√5 - 5√5 )} - 8² + 6² = ?
11          20          ?             64          112        192
...350 435 367 ? 384 401
...0, 6, 24, ?, 120, 210
21, 37, 73, 137, ?, 381
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
18, 34, 70, 134, ?, 378
120, 136, 111, 147, ?, 162
What will come in place of the question mark (?) in the following number series?
124, 131, 117, ?, 110, 145
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