Evaluate the given expressions (to two decimal places).
2(90)+5(80)+10(70)+3(60)+3(50)+4(40)= than divide by 25
mean =70.8
median =70
mode =70
range = 50
I do not understand.
is your data set
2 90 s
5 80 s
10 70 s
etc?
if so I count 27 data points not 25
mean = 1770/27 = 65.56
mode is clearly 70 if there are ten of them
median, there are 10 below 70 and 4 above 70 so the median is in your 70 group, yes
the range is from 40 to 90 so yes 50
thank you very much Damon.
You are welcome :)
To evaluate the given expression, we multiply each number by its respective coefficient and then add them all together:
2(90) = 180
5(80) = 400
10(70) = 700
3(60) = 180
3(50) = 150
4(40) = 160
Adding all of these gives us:
180 + 400 + 700 + 180 + 150 + 160 = 1770
Next, we divide this sum by 25:
1770 / 25 = 70.8
After evaluating the given expression, we get a mean of 70.8.
To find the median, we need to arrange the numbers in ascending order:
40, 50, 60, 70, 70, 80, 90
Since there are an odd number of numbers (7 in this case), the median is the middle number. In this case, the middle number is 70. Therefore, the median is 70.
To find the mode, we look for the number that appears most frequently. In this case, the number 70 appears twice, which is more than any other number. So the mode is 70.
To find the range, we subtract the smallest number from the largest number. In this case, the smallest number is 40 and the largest number is 90. So the range is:
90 - 40 = 50