Discussion
The pie chart given below shows the price of seven articles. The total price of all these seven articles is 28800. The price of a particular article is shown in terms of degree with respect to the total price of all these seven articles.
J1 = The value of average price of A and B
J2 = The difference between the price of G and C
What is the value of (J1 – J2)?
Answer: C
In a pie chart the price of an article is its angle over 360 degrees times the total of 28800. The average price of A and B is J1, with A at 125 degrees and B at 75 degrees: the average angle is 100 degrees, so J1 = 100/360 x 28800 = 8000. The difference of G, at 60 degrees, and C, at 12 degrees, is 48 degrees, so J2 = 48/360 x 28800 = 3840.
\[ J1 - J2 = 8000 - 3840 = 4160 \]
So the value is 4160, option (C). The values 3840 and 5280 are the price of J2 and a wrong average.
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