A student multiplied a number by 4/5 instead of 5/4. What is the percentage error in the calculation?
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In how many different ways could couples be picked from 6 men and 9 women ?
Number of mens = 8
Number of womens = 5
Different ways could couples be picked = C16× 9C1 = 9 x 6 = 54 ways.
A man travels 3⁄4th of the distance of his journey by bus, 1⁄6th by Rickshaw and 2 km on foot. Then total distance travelled by the man is
An article costs Rs 50 presently. The rate of inflation is 300%. What will be cost of this article after two years?
A = P(1 + r/100)n ⇒50(1 + 300/100)2 ⇒50(4)2 ⇒800
A, B and C are three students. A got 36% less marks than B and 16% more marks than C. If B got 145 marks, then what are the marks got by C?
The area of a circular cricket ground is 24.64 hectares. Find the cost of making rope boundary at the rate of Rs. 5.40 per metre.
A bank offers 15% compound interest per half year. A customer deposits Rs 8800 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is _____.
In the given figure, four identical semicircles are drawn in a quadrant. XA = 7 cm. What is the area (in sq.cm) of shaded region ?
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