Question

Out of a class of 20 students,your teacher chooses students at random to present their projects . What is the probable that she chooses you first ,and then chooses Kim second

Answer 1

1/20 because you're one of 20 students and anyone could go first or second

Answer 2

The probability is:

`(1)/(380)`

Explanation:

We know that the probability of an outcome is the number of favorable outcomes to the total number of outcomes.

The probability that she chooses you first ,and then chooses Kim second is given by:

`\text{Probability}=(1)/(20)* (1)/(19)`

( Since, firstly she needs to choose 1 student out of a total of 20 students and then she needs to choose 1 student i.e. kim out of the remaining 19 students )

Hence,

`\text{Probability}=(1)/(380)`