Question

1. Marks obtained by a student in 6 subjects are 84, 91, 72, 68, 87 and 78. Find the Arithmetic
Mean of the marks using Short-cut Methods.​

Answer 1

To find the Arthimetic Mean, we have to first add them all and then divide it by the number of things

Explanation:

Step-by-step :

Mean= 84+72+91+68+87+78

Then: divide it by the number of subjects

84+72 +91 +68 +87 +78 /6

480/6

The answer is 80