Answer: 29.3
Step-by-step explanation:
Abby's average after taking 31 quizzes is 76.
Total test scores= 31 × 76 = 2356
After Abby's teacher drops her 3 lowest test scores, her average increases to 81. This means that (31-3)= 28 test scores were used.
Total scores = 28 × 81 = 2268
Sum of Abby's three lowest score
= 2356 - 2268
= 88
Average of the three scores will now be 88 divided by 3
= 88/3
= 29.3
The average is 29.3
Answer:
29.3
Step-by-step explanation:
According to the question, Abby's average after taking 31 quizzes is 76. After her teacher drops Abby's 3 lowest test scores, her average increases to 81. What is the average of Abby's three lowest test scores?
Let's assume the total score of the 31 quizzes Abby took as x and the average of those scores is 76
To find out the yotla scores we do a cross multiply and we have
X = 76 × 31
X = 2356
And if her 3 lowest scores were removed and she had an average of 81,her total score was 81 × 28 = 2268
Now to find out the average of the lowest score,we subtract both scores and get their average
2356 - 2268 = 88/3
= 29.3
