Question

Given the following information, find the probability that a randomly selected student will be very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

Answer 1

`Pr=(45)/(208)\approx 0.216.`

Explanation:

You are given the information about students:

• 45 students are very short;
• 60 students are short;
• 82 students are tall;
• 21 students are very tall.

In total, there are 45 + 60 + 82 + 21 = 208 students.

Use the definition of the probability:

`Pr=\frac{\text{Number of favorable outcomes}}{\text{Number of all possible outcomes}}`

Number of favorable outcomes = 45

Nomber of all possible outcomes = 208,

hence,

`Pr=(45)/(208)\approx 0.216.`