SSC CHSL 11 July 2019 Shift 1 Paper

The full marks for a paper is 300. The break-up of the marks into theory (X), practical (Y) and project (Z), Which are the three components of evaluation is 6 : 5 : 4. In order to pass one has to score at least 40%, 50% and 50% respectively in X, Y, Z and 60% in aggregate. The marks scored by four students A, B, C and D are shown in the given Bar Graph.

How much percentage marks more than B has C scored in practical?