The ordinary die was rolled 100 times. The odd number appeared 20 times. What percent of a time did the even number appear?
A) 20%
B) 0.2%
C) 80%
D) 0.8%
E) none of these

Question

The ordinary die was rolled 100 times. The odd  number appeared 20   times. What percent of a time did the even   number appear?
A) 20%
B) 0.2%
C) 80%
D) 0.8%
E) none of these

Quizplus · Accepted Answer

We know that the die was rolled 100 times in total.
Out of this, odd numbers appeared 20 times.
Therefore, even numbers must have appeared 100 - 20 = 80 times.
To find the percentage of a time even number appeared, we can use the formula:

Percentage = (Part / Whole) x 100%

Here, the Part is the number of times even number appeared (which is 80) and the Whole is the total number of times the die was rolled (which is 100).
Substituting these values, we get:

Percentage = (80 / 100) x 100%
Percentage = 80%

Therefore, the answer is C) 80%.

The Ordinary Die Was Rolled 100 Times