A world congress of mathematicians were held in Nice in 1970 with 800 people participating. There were 300 from Europe, 200 from America, 150 from Asia, 45 from Africa and 105 from Australia. Representing the above on a pie chart, the angle of the sector representing the participants from Asia is?

A.
150^{o} 
B.
67(frac{1}{2})^{o} 
C.
67^{o} 
D.
135^{o} 
E.
68^{o}
Correct Answer: Option B
Explanation
Representing from Asia is 150
(frac{150}{800}) x 360
= (frac{135}{2})
= 67(frac{1}{2})o