The table shows the number of three different brands of laptops sold by a certain store. The data are represented by the pie chart which shows a semicircle divided into six equal sectors. The angle representing the number of the Bell laptop is;

Brand	Number of laptops
Ace	60
Bell	40
Compact	20

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∠POR

∠ROV

∠QOT

∠POU

answer is B.

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Detailed Solution

Let circle represents total no. of laptops = 60 + 40 + 20 = 120
Area of semicircle =

\frac{120}{2}

= 60
For PSV since they are divided into equal parts
Area of each part =

\frac{60}{6}

=10
Now, No. of laptops of Bell = 40
∴ combination of any four continuous parts from six gives the no. of laptops of Bell.
⇒∠ROV=∠ROS+∠SOT+∠TOU+∠UOV
∠ROV=10+10+10+10=40
Therefore option (2) is correct.

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