Question

An envelope contains small strips of paper of equal size and shape. Four of the strips have the number 4 written on them, five of the strips have the number 5 written on them, and three of the strips have the number 3 written on them. What is the probability of randomly pulling a strip with the number 4 written on it followed by pulling a strip with the number 3 written on it?

Answer 1

Answer:
`(1)/(11)`

Explanation:

Given

There are four
`4` written strips

Five of
`5` written on them

three of
`3` written on them

Now the probability of of pulling a strip with number 4 written followed by pulling a strip 3 written on it

`P=\text{Probability of pulling a 4 written }* \text{Probability of pulling 3 written strip out of remaining}`

`P=(4)/(12)* (3)/(11)`

`P=(4* 3)/(12* 11)`

`P=(1)/(11)`