## Domanda di colloquio

Colloquio per Senior Data Analyst

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# A gas station has 30 gallon of gasoline worth 1.20 per gallon and some worth 1.40 per gallon .how many gallons of the 1.40 brand must the owner mix in to produce gasoline that cost 1.28 per gallon

Risposta

## Risposte di colloquio

4 risposte

2

x+y=30 (amt of gas the station has available) x = 30 - y (1.2x + 1.4y)/(30) = 1.28 ((1.2*(30 - y) + 1.4y))/(30) = 1.28 1.2*(30 - y) + 1.4y = 38.4 36 - 1.2y + 1.4y = 38.4 .2y = 2.4 y = 12

Anonimo su

1

(1.2x + 1.4y) / (x + y) = 1.28 1.2x + 1.4y = 1.28x + 1.28y 1.4y - 1.28y = 1.28x - 1.2x .12y = .08x y = .66666667x = (2/3) x if x = 30, y = 30 x (2/3) = 20

Anonimo su

0

20; if 30, the price would be 1.30. so has to be smaller than 30.

Anonymous su

0

Let x be the total number of gallons priced at 1.20/g Total number = total price 30 + x = 1.20(30) + 1.40x Average price = 1.28/gallon (1.20(30) + 1.40x)/(30+x) = 1.28/gallon Doing the algebra and solving for x, x = 20

Vinay Rai su

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