Question
A work can be completed by βAβ and βBβ, alone in
10 days and 15 days, respectively. Find the number of days taken by βCβ to complete the same work alone if βAβ, βBβ and βCβ together can complete the whole work in 3 days.Solution
Let total work = 30 units (LCM of 10 and 15) Efficiency of βAβ = (30/10) = 3 units/day Efficiency of βBβ = (30/15) = 2 units/day Combined efficiency of βAβ, βBβ and βCβ = (30/3) = 10 units/day Efficiency of βCβ = 10 β (3 + 2) = 5 units/day Required time taken = (30/5) = 6 days
The 'Sacrifice Ratio' in the context of the Phillips Curve refers to:
If the R2 value for a regression line is 0.75 for 20 observations. What is the adjusted Rsquare value if the number of independent variables ...
Which of the following growth theorists is best known for developing a model that explicitly embodied technical change into new capital goods (the "Vint...
If demand is price inelastic, then
In cluster sampling:
Consider an exchange economy with two agents, 1 and 2, and two goods, X and Y. Each agent's consumption set is in +R2. The endowments of agents 1 and 2 ...
What is the slope of the Engel curve for a Giffen good?
Suppose the regression specification y(hat) = a + Ξ²x +Β l Β z + Ξ΅ was estimated as y = 5 + 6x + 7z. We have a new observation for which x = 5 and z = ...
Assume that there are equal numbers of male and female students in a university. Of all male students, 10 per cent major in economics; and of ...
