A vehicle when climbing up a gradient consumes petrol at the rate of 1 litre per 8 kms, while coming down it gives 12 kms per litre. Find its average consumption for to and fro travel between two places situated at the two ends of a 25kms long gradient.
X (km/L) W(km) `(w/x)-> (l)` 8 25 `25/8 = 3.125` ` 12 25 `25/12 = 2.083` `sum` wi= 50 `sum (Wi)/(chiiota ) = 5.208` Harmonic Mean = `(sum wi)/(sum(wi)/(chiiota))` = `(50)/(5.208)` = 9.6 liter Hence average consumption is 9.6 Liters.
Holly, Brian, Fred, Tracy, and Melanie have income elasticities for veggie burgers as given below:
Person Income elasticity of demand
Tracy 2
Brian 1
Fred -0.75
Holly 0.1
Melanie -1.5
Who would respond the least in their purchase of veggie burgers in response to an increase in income?
Longevity is proxy for ---- in the Human Development Index?
If f(x) is continuous for all real values of x and f(x) takes on only rational values, then if f(1)=1, the value of f(0) is
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 all female students, 5% major in economics. What is the probability that a student selected at random will be an economics student?
