Mohan has a hobby of solving problems every day. He solved 2, 4, 3, 2, 4, 5, 1 problems in the last week. What is the mean number of problems solved by Mohan per day?

Solution:

Since Mohan solved 2, 4, 3, 2, 4, 5, 1 problems in the last week,

∴ Mean = Σx = 2 + 4 + 3 + 2 + 4 + 5 + 1 = 21 = 3 n 7 7

∴ Mean = 3

It means on an average Mohan solved 3 problems per day.