Question

A box contains 10 red ribbons and 12 blue ribbons. Once a ribbon is picked, it is not replaced. What is the probability of choosing a red then a blue ribbon?

Answer 1

I belive the answer is 1.
This is because out of 22 ribbon there are 10 which are bue so the probability of blue ribbons is 10/22 and probability of red ribbon is 12/22. So your question was the probability of choosing a red ribbon then a blu ribbon. Because of the word "then" , this means it is simply asking you to add their probablity so after adding 10/22 with 12/22 your answer will come to 22/22 which is equal to 1.

Answer 2

The probability of choosing a red then a blue ribbon is 20/77.

What is the probability of choosing a red then a blue ribbon?

Probability calculates the likelihood of an event occurring. The likelihood of the event occurring lies between 0 and 1. It is zero if the event does not occur and 1 if the event occurs.

The probability of choosing a red then a blue ribbon = (number of red ribbion / total number of ribbons) x  (number of blue ribbions / total number of ribbons left)

Total number of ribbons = 10 + 12 = 22

The probability of choosing a red then a blue ribbon = (10/22) X (12/21) = 20/77

To learn more about probability, please check: https://brainly.com/question/10750263