The mean of a set of numbers is the sum divided by the number of terms.
3889+1482
Step 3
Cancel the common factor of 3889+148 and 2.
Factor2 out of 3889.
2(1989)+1482
Factor2 out of 148.
2(1989)+2⋅742
Factor2 out of 2(1989)+2⋅74.
2(1989+74)2
Cancel the common factors.
Factor2 out of 2.
2(1989+74)2(1)
Cancel the common factor.
2(1989+74)2⋅1
Rewrite the expression.
1989+741
Divide1989+74 by 1.
1989+74
1989+74
1989+74
Step 4
To write 74 as a fraction with a common denominator, multiply by 8989.
1989+74⋅8989
Step 5
Combine74 and 8989.
1989+74⋅8989
Step 6
Combine the numerators over the common denominator.
19+74⋅8989
Step 7
Simplify the numerator.
Multiply74 by 89.
19+658689
Add 19 and 6586.
660589
660589
Step 8
Divide.
74.21348314
Step 9
The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.