His sum should be more than 48.
I know because if you throw away the decimal pieces
and just add up the whole numbers 45 and 3 ,
right there you would have 48 . So when you include
the decimal pieces, they'll make it even bigger.
Double of 50 is 100, so 28*100=2800, now half of the answer is 2800/2=1400
It is equivalent to:
-6 + (-8)
The complete answer is 122.2608696, or more preferred, 122.2607
If all students scored the same the score of each student would be 4.5.
