The number of Candidates who attended the mock is 1200.
From the information given, we can deduce the following :
Let :
- Total number of students = x
cleared all = 0.05x
cleared none = 0.05x
Amount left = x - 0.05x - 0.05x = 0.9x
Cleared one section = 0.25(0.9x) = 0.225x
cleared 4 sections = 0.2(0.9x) = 0.18x
cleared 2 sections = 0.245x
cleared 3 sections = 300
Take the sum = x
0.05x + 0.05x + 0.225x + 0.18x + 0.245x + 300 = x
0.75x + 300 = x
300 = x - 0.75x
300 = 0.25x
x = 300/0.25
x = 1200
Hence, the number of Candidates who attended the mock is 1200.