Need help on learning how to answer the following questions

1. how many combinations of 5 people can be formed from 6 people?
2. if event A and Event b cannot occur jointly ( simultaneously) P( A and B ) =0, and A and B are called mutually exclusive events so if a local zoo only has mammals an reptiles, the sample for typed of zoo animals would be only mammals and reptiles. based on the zoo that has only mammals and reptiles , the sample space for this question contains only mammals and reptiles

choose the statment that is true for this scenario?

• P ( mammal and reptile) > 0, possible
• P ( Mammal or reptile) = 0, or impossible
• P ( Mammal or reptile) = 1, or certain
• P ( mammal and reptile) <0
• P( mammal and reptile) = 0, or impossible

3.P ( A) = 0.500

P( B) = 0.200

P ( Aand B) = 0.100

4. when are events A and B Dependent?

• P( A and B) >0 and P( A and B ) = P( A) x P ( B)
• P( A and B) = 0
• P( A and B ) = P ( A) x P ( B)