Sally took four tests in science class. On each successive test, her score improved by 3 points. If her mean score was 69.5%, what did she score on the first test?

After inherit

• Let x be the score she got on the first test
  Score improved by 3 points on each successive test... The AP ll be
  x, x+3, x+6, x+9
  Mean score = 69.5
  x+x+3+x+6+x+9/4 = 69.5
  4x + 18 = 278
  4x = 260
  x = 65
  
  She score 65% on the first test
  
  Ans : 65%
• 10 years agoHelpfull: Yes(4) No(0)
• let score at first test be x
  total score = x+(x+3)+(x+6)+(x+9)= 4x+18
  mean= x+4.5
  => x+4.5=69.5
  => x=65 (here we considered test of 100 marks)
• 10 years agoHelpfull: Yes(0) No(0)