Discrete Structures20755 marksNumerical: combinatorics family invitationsPermutations and Combinations
List any two applications of conditions of probability. You have 9 families you would like to incite to a wedding. Unfortunately, you can only invite 6 families. How many different sets of invitations could you write?
List any two applications of conditions of probability. You have 9 families you would like to incite to a wedding. Unfortunately, you can only invite 6 families. How many different sets of invitations could you write? [5]
- Total families available: $n = 9$ - Families to be invited: $r = 6$ - Order does not matter (a set of invitations), so this is a combination problem. --- Conditional probability $P(AB)$ is the probability of event $A$ occurring given that event $B$ has already occurred. Two applications: 1. Med...