Average of the n numbers = (sum of n numbers)/n

Let's see what happens when the sum EQUALS 48
We get: 1.2 = 48/n
In this case, n = 40 (since 48/40 = 1.2)

However, the question tells us that the sum of the n numbers is greater than 48
So, x CANNOT equal 40
In fact, x must be greater than 40
So, the least possible value of n is 41

Cheers,
Brent
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48/n=1.2
n=40
Therefore >40
Which implies 41 is the answer.