Ravi's mean score over his first 6 unit tests was 72. After the 7th and 8th tests his mean became 75. If his 8th score was 8 marks more than his 7th, what did he score in the 8th test?

Question

Accepted Answer

88. Total after 8 tests =8×75=600; after 6 tests =432. Tests 7 and 8 add to 168, so x+(x+8)=168 x=80 and the 8th score is 88. (80 is the 7th score.)

Ravi's mean score over his first 6 unit tests was 72. After the 7th and 8th tests his mean became 75. If his 8th score was 8 marks more than his 7th, what did he score in the 8th test?

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