Question

I desk has 4 fountain pens 10 gel pens and 6 ball point pants what is the probability of randomly choosing a gel pen replacing it and then choosing a fountain pen

Answer 1

[AI-generated answer — Bot GPT 3.5]

Firstly, there are a total of 20 pens on the desk (4 + 10 + 6 = 20).

The probability of randomly choosing a gel pen is 10/20 = 1/2.

After replacing the gel pen, there are now 20 pens on the desk, including 10 gel pens and 4 fountain pens.

The probability of randomly choosing a fountain pen after selecting a gel pen is 4/20 = 1/5.

So, the probability of randomly choosing a gel pen and then a fountain pen is:

(1/2) * (1/5) = 1/10 or 0.1

Therefore, the probability of randomly choosing a gel pen and then a fountain pen is 0.1 or 10%.