The average score of 5 students in a Mathematics test is 78. After a 6th student joins the group, the average drops to 76. What is the score of the 6th student?
Show Worked Solution
Worked Solution
Step 1: Find the total score of the original 5 students.
Total = Average x Number of students
= 78 x 5
= 390
Step 2: Find the total score of all 6 students after the 6th joins.
Total = 76 x 6 = 456
Step 3: Find the 6th student score.
6th student score = 456 minus 390 = 66
The 6th student scored 66 marks.
Answer: 66
Correct answer: 66
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