Candidates of four schools appear in a mathematics test. The data were as follows: Schools No. of Candidates Average Score I 60 75 II 48 80 III Not available 55 IV 40 50 If the average score of the candidates of all the four schools is 66, find the number of candidates that appeared from school III.

Question

Philoid · Accepted Answer

Let the number of candidates from school III be P.

Schools	No. of candidates (N ;)	Average score (x ;)
I	60	75
II	48	80
III	P	55
IV	40	50

Given,

Average score of all schools = 66

= 66

10340 + 55P = 66P + 9768

10340 – 9768 = 66P – 55P

P = = 52

Schools	No. of Candidates	Average Score
I	60	75
II	48	80
III	Not available	55
IV	40	50

Candidates of four schools appear in a mathematics test. The data were as follows:SchoolsNo. of CandidatesAverage ScoreI6075II4880IIINot available55IV4050If the average score of the candidates of all the four schools is 66, find the number of candidates that appeared from school III.