Question
A man running at the speed of 6 kmph was over taken by
the train moving with the speed of 78 kmph in 23 seconds. Find the length of train.Solution
According to the question, Let length of train be ‘x’ m. => (Speed of train – Speed of man) = Length of train/Time => (78 - 6)× (5/18) = x/23 => 20 = x/23 => x = 460 Length of train is 460 meter.
At a round table, n persons are seated on n chairs. The probability that two friends from same college are sitting next to each other, is:
The deseasonalised time - series data will have only trend (T), cyclical (C) and irregular (I) components and is expressed as:
The grouped data for the observation are as follows.
Class :Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2-4Â Â Â Â Â Â Â Â 4-6Â Â Â Â Â Â Â Â Â 6-8<...
These seventh decile (D7) of data set 4, 3, 10, 9, 1 is
The coefficient of correlation is the _________ of coefficients of regression.
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:
Which option is WRONG?
Which option is incorrect for the component of ti.me series.
