Question
Alok and Vinay can complete some work alone in 12 days
and 20 days respectively. Both of them started the work together but Vinay left the work 4 days before the completion. For how many days both of them have worked together?Solution
Let the total work be 60 units (LCM of 12 and 20) . Efficiency of Alok = (60/12) = 5 units/day Efficiency of Vinay = (60/20) = 3 units/day If Alok and Vishal worked together for 'N' days, then; (5 + 3) X N + (5 X 4) = 60 Or, 8N = 60 - 20 So, 'N' = (40/8) = 5
___________ refers to the degree of correlation of the same variables between two successive time intervals
Let X and Y be two related variables. The two regression lines are given by x-y+1=0 and 2x-y+4=0. The two regression lines pass through the point:
When we say that the estimator is BLUE. What does best signify here?
If bxy = 0.20 and rxy = 0.50, then byx is equal to:
Which of all the following is not an assumption of Marshall Consumer Theory of Demand?
Umar has the utility function U(b,w) = min (b,w) and Akshat has the utility function U(b,w) = bw. If we draw an Edgeworth box with b on the ho...
 The sum of squared deviation is minimum when taken from
For a positively sloped LM curve, which of the following statements is CORRECT?
Autocorrelated errors is about