Explore BrainMass

# Probability

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Mr. X invites 15 relatives to a party: his mother, three uncles, two aunts, four brothers, and five cousins. If the chances of any one guest arriving first are equally likely, find the following probabilities:

a. the first guest is an uncle or a cousin
b. the first guest is a brother or a cousin
c. the first guest is an uncle or her mother

https://brainmass.com/math/probability/calculating-probability-situation-4306

## SOLUTION This solution is FREE courtesy of BrainMass!

Total No# of Relatives = 15

a) No of Uncles = 3
No of Cousins = 5

Probability = Number of success events / Total Number of events
= (3+5)/15
= 8/15

b) No of Brothers = 4
No of cousins = 5

Probability = 9/15 ( same logic as above)

c) No of Uncles = 3

Probability = (3+1)/15 ( +1 FOR MOTHER)
= 4/15.

Hope it is clear.

Once again: Probability = No of success events/ Total No of events

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!