Question
The cost price of Shirt is Rs. 700 more than the cost
price of T-shirt. Shirt is sold at a profit of 20%, and T-shirt is sold at a profit of 35%. If both shirts have the same selling price, find the cost price of shirt.Solution
ATQ, (x+700) 120/100 = x135/100 24x + 16800 = 27x 3x = 16800 x = 5600 Cost price of shirt = 5600 + 700 = Rs.6300 Required answer = Rs.6300
For the two variables X and Y, the following observations are tabulated
X:           3             4        �...
If xi | fi , i = 1,2,...n is a frequency distribution with standard deviation 15 and mean 30, the coefficient of variation will be equal to:
If the odds in favour of any random event A are 5 : 6, then the odds against the event are:
The variance of degenerate random variable is:
If r and R denote correlation and multiple correlation coefficient for the data set for X1, X2 and X3 . Which option is correct?
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(I) Quadratic trend
(II) Linear trend
Which one is not basis of classification of data.
For a distribution, the mean is 10, variance is 16, Y1 is +1 and β2 is 4. The distribution is:

A man pedals cycle from his house to his office at a speed of 10 km/h and back from the office to his house at a speed of 15 km/h. His average speed (i...