Critical Reasoning (CR) | Re: From 1950 to 1975, the average number of students graduating

What is the source of this question? I got answer E through POE but I don't understand why E is necessarily true.

Lets say Original number is 100 and increased by 40% gives us 140 students graduating.
x students graduate with honors and 20% increase is x times 1.2

here, x can be any number less than or equal to hundred. So why is it true that the number of students graduating without honors increased by more than 40 percent.

So confused
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