Question
The average cost of three chairs is Rs.11000. The
average cost decrease by 20% when one more chair is included. What is the cost price of the 4th chair?Solution
Total cost of three chairs = 11000 × 3 = Rs. 33000 Average cost of all the four chairs = 11000 × (80/100) = Rs. 8800 Total cost of all the four chairs = 8800 × 4 = Rs. 35200 Cost of the 3rd chair = 35200 - 33000 = Rs. 2200
More Average Questions
342 – 232 + 256 – 104 = ?
14 × 11 + 25 – ? = 21% of 300
2850 ÷ 2.5 - ? × 42 = 300
What will come in the place of question mark (?) in the given expression?
(72 × 6 ÷ 12) × 6 = ?
Find the value of 325 × 5 + 31 × 21 – 22 × (63 − 52).
√? = 80% of 720 - 22% of 2500
5555 ÷ 11 ÷ 5 = 100 + ?
- What will come in place of (?) in the given expression.
[45 + (36 ÷ 6)] × 2 – 10 = ? (23.95)2 – (25.006)2 + (8.0099)2 – (7.07)2 = ? - (14.990)2
If a³ - b³ = (a - b)(a² + ab + b²), find a³ - b³ when a = 10 and b = 4.
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