First, put the data set from least to greatest.
10, 18, 6, 11, 12 → 6, 10, 11, 12, 18
________
Find the median with finding what the middle value of the data set is.
6, 10, 11, 12, 18
Median is 11.
________
Find the mean with adding all the numbers and dividing it by how many numbers their are.
6 + 10 + 11 + 12 + 18 = 57
57 / 5 = 11.4
Mean is 11.4
________
Best Regards,
Wolfyy :)
Answer: -6=-4 or x=2,3
Step-by-step explanation:
Answer:
New avaerage if 2 students (15 year old) left = 13
Step-by-step explanation:
Given:
Average age of 20 students = 13.2
Find:
New avaerage if 2 students (15 year old) left
Computtaion:
Sum of all 20 student's age = 20 x 13.2
Sum of all 20 student's age = 264
Sum of current 18 student's age = 264 - 15 - 15
Sum of current 18 student's age = 234
New avaerage if 2 students (15 year old) left = 234 / 18
New avaerage if 2 students (15 year old) left = 13
Ok you must do the inverse of division which is multiply
2c + 4d = 92
substitute the given values into the expression and evaluate
2c + 4d = (2 × 30) + (4 × 8) = 60 + 32 = 92
