CÂU HỎI 8 (SINGLECHOICE)
Suppose that
after 10 years of service, 40% of computers have problems with motherboards
(MB), 30% have problems with hard drives (HD), and 15% have problems with both
MB and HD. What is the probability that a 10-year old computer has problems with MB or HD?
0.4
0.45
0.3
0.55
0.7
