Question
Prateek bought 2 items at the same price. He sold one
item at 20% profit and another item at 25% profit. What is the overall percentage profit he made?Solution
Let Prateek buys each item for Rs 'x'
Total Selling Price of the two items = (120/100)*x + (125/100)*x = Rs 2.45x
Percentage profit made = ((2.45x - 2x)/2x)*100% = 22.5%
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
Â
The memory-less property is followed by which of the following continuous distribution: