Question

Can someone help me and explain how to do these probability questions?

Answer 1

The answer to question A is 1/100 and 1%. For question B I think the answer is C but I’m not 100% sure on that unfortunately.

Answer 2

a. The probability is 1/100 since there are 10 possible digits (0-9) and you need the last two digits so $\frac{1}{10}*\frac{1}{10}=\frac{1}{100}$.

This is 1%.

b. Let's start by calculating the probability of getting the right digits knowing that they are both even.

We have a total of 5 even digits (0, 2, 4, 6, 8). You need the last two so $\frac{1}{5}*\frac{1}{5} =\frac{1}{25}=\frac{4}{100}$ which is 4%.

Therefore the answer is a) It increases the probability that your choice is correct to 1/25, or 4%, because each digit could be 0, 2, 4, 6 or 8.