There are 88 balls in a bucket. The balls are numbered from 1 to 88. One ball is randomly selected from the bucket.
What is the probability that ball 55 is chosen?
5 answers
Since there is only one ball numbered 55 and 88 total balls, the probability of selecting ball 55 is 1/88.
Joey had 40 words to study for a spelling quiz, but he only learned 6 of them. His teacher surprised the class by telling them that the quiz would only have 1 of those 40 words on it. If the teacher chose that 1 word randomly, what is the probability that it was one of the words Joey learned?
The probability that the word chosen is one of the words Joey learned is equal to the number of words Joey learned divided by the total number of words.
So the probability is:
6/40 = 3/20
or
0.15
or
15%.
So the probability is:
6/40 = 3/20
or
0.15
or
15%.
A class of 17 students is having a drawing. Each student's name is placed on a piece of paper and then placed in a hat. One name is randomly drawn from the hat.
If there are 9 boys in the class, what is the probability that the name drawn is a girl's?
If there are 9 boys in the class, what is the probability that the name drawn is a girl's?
There are 17 students in the class, and 9 of them are boys. That means there are 17 - 9 = 8 girls in the class.
The probability of drawing a girl's name is equal to the number of girls in the class divided by the total number of students in the class.
So the probability is:
8/17
or
0.47
or
47%.
The probability of drawing a girl's name is equal to the number of girls in the class divided by the total number of students in the class.
So the probability is:
8/17
or
0.47
or
47%.