Candidates of four schools appear in maths test. The data is as follows:
If the average score of the candidates is 66. Find the number of candidates appeared from School C.
52
45
57
49
Candidates of 5 schools appear in a maths test. The data is given as follows :
SchoolsNo.of CandidatesScoreA6075B4880C−55D4050E5060
If the average score of the candidates is 64.8, then find the number of candidates from school C.