Nizar was computing a statistics problem asking for the probability of event a. his answer was 1.36 using your knowledge of probability, why should nizar have known that his answer was not correct and gone back to review his calculations?

Probability measures the likelihood that an event will occur. In this regard, it was right to use probability to establish if event A will occur or not. However, probability is normally quantified between 0 and 1 or between 0% and 100%. In this case, 0 (or 0%) is a measure of impossibility that an event will occur while 1 or (100%) is a measure that the event will occur.

In the current case, 1.36 violates this basic rule as it is more than 1 or the % sign may be missing. In this case, the Nizar should repeat the calculation taking into consideration any mathematical signs.