Basic Math Examples

Find the Mean 67 , 68 , 81 , 86 , 77 , 88 , 69 , 78 , 84 , 76 , 67 , 61 , 61 , 87 , 75
67 , 68 , 81 , 86 , 77 , 88 , 69 , 78 , 84 , 76 , 67 , 61 , 61 , 87 , 75
Step 1
The mean of a set of numbers is the sum divided by the number of terms.
67+68+81+86+77+88+69+78+84+76+67+61+61+87+7515
Step 2
Simplify the numerator.
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Step 2.1
Add 67 and 68.
135+81+86+77+88+69+78+84+76+67+61+61+87+7515
Step 2.2
Add 135 and 81.
216+86+77+88+69+78+84+76+67+61+61+87+7515
Step 2.3
Add 216 and 86.
302+77+88+69+78+84+76+67+61+61+87+7515
Step 2.4
Add 302 and 77.
379+88+69+78+84+76+67+61+61+87+7515
Step 2.5
Add 379 and 88.
467+69+78+84+76+67+61+61+87+7515
Step 2.6
Add 467 and 69.
536+78+84+76+67+61+61+87+7515
Step 2.7
Add 536 and 78.
614+84+76+67+61+61+87+7515
Step 2.8
Add 614 and 84.
698+76+67+61+61+87+7515
Step 2.9
Add 698 and 76.
774+67+61+61+87+7515
Step 2.10
Add 774 and 67.
841+61+61+87+7515
Step 2.11
Add 841 and 61.
902+61+87+7515
Step 2.12
Add 902 and 61.
963+87+7515
Step 2.13
Add 963 and 87.
1050+7515
Step 2.14
Add 1050 and 75.
112515
112515
Step 3
Divide 1125 by 15.
75
 [x2  12  π  xdx ]