Question
A and B together can do a work in 9 days. If A can alone
do the same work in 12 days, then in how many days B alone will do the same work?Solution
Total work = Number of days × 1 day’s work (efficiency) Total work = LCM (9, 12) = 36 unit 1 day’s work of (A+B) = 36/9 = 4 unit 1 day’s work of A = 36/12 = 3 unit 1 day’s work of B = 4 - 3 = 1 unit Now, Time taken by B to completed the work = 36/1 = 36 days
An employee has a basic pay of Rs. 12000 and a D.A. of 12% in 1997. If the employee should get a 5% rise in real income each year, what should be the DA...
The correlation coefficient between X and -X is:
Elistan can produce either 5 monster trucks or 10 cans of silly string in a day. What is the opportunity cost of one can of silly string?
In a model with two goods, x & y, with x plotted on the horizontal axis, the price consumption curve generated by changing the price of x is parallel to...
X, Y and Z constitute a random sample of size 3 from normal population with the mean µ and variance α2, find the efficiency of (X...
If quantities of all commodities change in the same proportion then
Which of the following Herfindahl-Hirschman Index is most consistent with monopoly?
Consider the following:
Statement 1: There exists an inverse relationship between market rates of interest and price of bond
Statement 2: ...
Which is not a fixed cost?
While calculating Pearson's correlation coefficient, the following values are obtained for 25 pairs of observations. It was later discovered that two pa...