A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points, the team scored, was :

a. 672
b. 665
c. 645
d. 588

• Ans-b 665
  let 7 team member scored=y
  let first average=x
  the best score is 85 then 85+y=8x------(1)
  if he had scored 92 the average become 84==> 92+y=8(84)==>92+y=672-----(2)
  solving ()&(2) we get x=665/8
  put x value in equ (1)then we get y=580
  y is only seven team member score.along with 8th person=580+85=665
  
  
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