Question
Average of first 2 numbers is twice the average of next 4
numbers. If the average of all 6 numbers is 18, find the sum of the last 4 numbers.Solution
Let the sum of the last 4 numbers be 'n'.
(sum of first 2 numbers) ÷ 2 = 2 × (n/4)
⇒ Sum of first 2 numbers = n
Total sum = n + n = 2n
Average of 6 numbers = 2n ÷ 6 = 18
⇒ 2n = 108
⇒ n = 54
When the price of a commodity decreases, and its demand curve forms a rectangular hyperbola, what happens to the total expenditure on that commodity?
A dice was rolled 3 times. What is the probability of getting 5 at least once?
C = 40+0.75Y
I = 140 – 10i , G=100, T=80, Money demand = 0.2Y – 5i , Money Supply = 85
Suppose the government increases the ex...
The Impossible Trinity (or Trilemma) in international finance states that a country cannot simultaneously have:
Within a country, the domestic price of a product will equal the world price if
A worker’s wage in 1996 was Rs.180. What should be the wage in 1999 so that the worker remains at the same level of consumption? [Consider 1995 as the...
What is the terms of trade formula?
The Likelihood Ratio (LR) Test is often preferred over the Wald Test or the Lagrange Multiplier (LM) Test for hypothesis testing in models like Maximum ...
1) Calculate the standard error of the estimate of Y on X regression equation for the following data
N =50 , ∑y^2 = 150 , ∑xy = 180, &sum...
The 2nd phase (diminishing returns to a factor) is exhibited by the following total product sequence:
Relevant for Exams:
