Answer
a. 0.011
b. 0.222
c. 0.054
d. 0.337
e. 0.436
Work Step by Step
a. P(US and postgrad) = 84/7690 = 0.011
b. P(US|postgrad)
= P(postgrad and US)/P(postgrad)
= 84/7690 / 379/7690
= 0.222
c. P(postgrad|US)
= P(US and postgrad)/P(US)
= 84/7690 / 1557/7690
= 0.054
d. P(primary|China)
= P(China and primary)/P(China)
= 506/7690 / 1502/7690
= 0.337
e. P(China|primary)
= P(primary and China)/P(primary)
= 506/7690 / 1161/7690
= 0.436
