Probability Question

probability you live in large city Pc= [20+80+120]/650
Probability you live in a suburb Ps= [120+45+60] /650
probability you live in a rural area Pr=[95+25+5] /650

1) given you live in a suburb the probability you own a home is 120/[120+45+65]

2) what is the probability you live in a suburb OR large city?
when you say OR you add, when you say AND you multiply
number of people living in a suburb or large city ={[20+80+120] +120+45+60] } /650 answer

also [650-[95+25+5] ] /650 should give same answer
Arthur
please check math
 
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