Quiz on Probability

Solution:

Cable T.V=1/5
VCR=1/10

Having both=1/3 of the Cable T.V= (1/3)(1/5)=1/15

Having either Cable TV or VCR=(1/10)+(1/5)-(1/15)=7/30
Having neither Cable Television nor Video cassette recorder =1-(7/30)=23/30