Question
Average of 20 numbers is 65. If the average of the first
eight and last six numbers is 75.5 and 55.5 respectively, and if the twelfth number is 25% more than the eleventh number and the thirteenth number is (40/9)% less than the twelfth number, then find the twelfth number.Solution
ATQ, Let the eleventh number be 10x. So, the twelfth number = 1.25 × 10x = 12.5x. Thirteenth number = 850/9 × 1/100 × 12.5x = 17x/3. So, 10x + 12.5x + 17x/3 = 65 × 20 – 8 × 75.5 – 6 × 55.5 = 360. Or, 100x/3 = 360. Or, x = 10.8. So, the twelfth number = 12.5 × 10.8 = 135.
19.89% of 449.67 + 14.67% of 299.89 - 9.89% of 99.79 = ?
`(sqrt(960.87)xx9.932+sqrt(629.998)xx26.385)/(sqrt(1028.902)xx4.977)=?`
Find the approximate value of Question mark(?). There is no requirement to find the exact value.
? = 200.14 + 27.98 × 16.05 − (10.03)² - 12.9...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
1299.999 ÷ 325.018 × 24.996 = ?
What approximate value should replace the question mark?
99.95 − √529 × 3 + 1439.80 ÷ 12.02 = ?
619.97 ÷ 20.01 X 124.99 ÷ 24.91 = ?
124% of 620.99 + 11.65% of 1279.23 = ?
What approximate value should replace the question mark?
9.96% of 1200.10 − 25% of 4800 = ? − 7000.20
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