Pie Charts - General Aptitude

Study the following graph carefully and answer the questions given below:

Distribution of candidates who were enrolled for MBA entrance exam and the candidates (out of those enrolled) who passed the exam in different institutes:

Q1:

The number of candidates passed from institutes S and P together exceeds the number of candidates enrolled from institutes T and R together by:

A 228

B 279

C 399

D 407

ANS:C - 399

Required difference = [(16% + 18%) of 5700] - [(8% + 10%) of 8550]
  = [(34% of 5700) - (18% of 8550)]
  = (1938 - 1539)
  = 399.