Question
A train covers a certain distance at a speed of 40 km/h
and the next same distance with a speed of 70 km/h and the next same distance with a speed of 120 km/h. find the average speed?Solution
Since the distance is same in all the conditions. Therefore, Average speed = 3xyz/(xy + yz + zx) Average speed = 3 x 40 x 70 x 120/(40 x 70 + 70 x 120 + 40 x 120) Average speed = 3 x 40 x 70 x 120/(2800 + 8400 + 4800) = 1008000/16000 = 63 km/hr  Â
While calculating Pearson's correlation coefficient, the following values are obtained for 25 pairs of observations. It was later discovered that two pa...
When the price of a commodity decreases, and its demand curve forms a rectangular hyperbola, what happens to the total expenditure on that commodity?
For a frequency distribution if Coefficient of variation is 5, standard deviation is 2 and Karl Pearson’s coefficient of skewness is 0.5, the value of...
The government provides public goods because
In which of the following market structure Quantity is maximum?
The Fisher Effect assumes that the    Â
The costs of inflation are?
Which of the following Herfindahl-Hirschman Index is most consistent with monopoly?
The fiscal deficit is the difference between the government’s total expenditure and its total receipts excluding ______
Relevant for Exams:
