n 4 subjects,Ashlee's mean score in her test was 85.After her 5th subject, her mean score rose to 88.How many marks did she score in her 5th subject

Question

In 4 subjects,Ashlee's mean score in her test was 85.After her 5th subject, her mean score rose to 88.How many marks did she score in her 5th subject

Answer 1

If Ashlee's mean score was 85 then her total score was 4×85=340.

If her score for the 5th subject is x then (340+x)/5=88 (mean score for 5 subjects).

Her total score for 5 subjects=5×88=440, therefore 340+x=440, making x=100. The 5th score was 100.