Question
Mohan bought a new car from the showroom and after one
year he sold it to Shyam at a profit of 20 percent. Shyam sold the same car to Sumit at the loss of 30 percent. Finally Sumit paid Rs. 67200 for this car. At what price Mohan bought the car?Solution
Let us assume Mohan bought a car at price P Shyam purchase the car from Mohan at = P × (120/100) = 6P/5 Sumit purchase the car from Sumit at = (6P/5) × (70/100) = 84P/100 = (84P/100) = 67200 P = [(67200 × 100)/84] = 8000
Completely randomized design is based on the principles of _________ and randomization only.
Five persons A, B, C, D and E occupy seats in a row at random. The probability that A and B sit next to each other is:
The second quartile for the following data 38, 39, 40, 52, 59, 67, 73, 77, 149, 248 is:
The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:
X:               �...
The variation among the observations of each specific class is known as:
For the following frequency distribution
Class :                 3-5        5-7         7-9      �...
If the first, second and third moment about origin are 2, 8 and 14. respectively, then Karl Pearson gamma coefficient of skewness y1 is:
Following two statements are related to regression coefficient
(I) Independent of the change of origin
(II) Independent of the change of scale
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The memory-less property is followed by which of the following continuous distribution:
