Seismic earth tremors occur at an active part of the earth's crust at the average rate of one every two days. What is most likely number of tremors to occur in a week.
My answer: 0.5*7=3.5
Book's answer: 3
What i want to know is the basis upon which the answer was reached?
How do I round of 3.5 in this situations? Normally it rounds to 4, sadly