Warm Up Solutions

1. What is the formula for independent events?

$\mathrm{P}\left(\mathrm{A} \mathrm{and} \mathrm{B}\right)=\mathrm{P}\left(\mathrm{A}\right)·\mathrm{P}\left(\mathrm{B}\right)$

2. Kim needs a dress for the spring dance. If she purchases a dress she likes at the first store, she will not go to another store. Explain if this is an independent or dependent event.

Sample: This is a dependent event because depending what she finds at the first store determines if Kim will go to another store.