Conditional probability

1
Conditional probability

• MMath test was .73
• F French test was .65
• Neither M or F .08

2
1st find Combined Probability

• MMath test was .73
• F French test was .65
• Neither M or F .08
• Combined formula
• P(M n F) P(M) P(F) P (MUF)
• .46 .73 .65 - .92
• Next is conditional

.08
.27
.19
.46
M
F
N
3
Conditional probability

• Two steps
• find combined probability
• P(M n F) P(M) P(F) P (MUF)
• .46 .73 .65 - .92
• Calculate conditional Probability
• P(A B) Combined/P(second event)
• .46/.65 .708 passed both