Speed of the train = 153 × (5/18) = 42.5 m/sec Length of the train = 42.5 × 13 = 552.5 metres Let the length of the platform be ‘x’ metres Therefore, 552.5 + x = 42.5 × 17 Or, x = 722.5 – 552.5 = 170 metres
Two random variables X and Y are said to be independent if:
The mean deviation from an average A will be minimum, if A represents:
Which of the following is NOT a type of data classification?
If A,B and C are arbitrary events, then P(A ∩ B ∩ C) equals to:
For the two variables X and Y, the following observations are tabulated
X:Â Â Â Â Â Â Â Â Â Â Â 3Â Â Â Â Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â...
If the random sample of size n is drawn without replacement from a finite population of size N, the correction factor for standard error of sample mean...
If the third quartile of the following data set 7,10,7,8,9 is 9.5, then the value of quartile deviation is:
Two data set of size 9 and 6 have standard deviation 3 and 4 respectively and arithmetic means 3 and 3 respectively. The standard deviation of combined...
With reference to index numbers, which of the following statements is true?
Marshall-Edgeworth Index number:
