veerendarvijay

In conditional probability, the notation P (A l B) is read:

"The probability of event A occurring given that event B has occurred."

For example: In the following two-way table P (Walk to school | Sophomore) = 3 /(2+25+3) = 0.1

 

Grade	Drive to School	Take the Bus	Walk
Sophomore	2	25	3
Junior	13	20	2
Senior	25	5	5

 

P (Take the bus | Sophomore) = [?]

Round to the nearest hundredth.

In how many ways can the first 4 guests arrive at a party if 15 guests have been invited?

[?] ways

Note: