2.26. Two out of six computers in a lab have problems with hard drives. If three computers are selected at random for inspection, what is the probability that none of them has hard drive problems?

2.26. Two out of six computers in a lab have problems with hard drives. If three computers are
selected at random for inspection, what is the probability that none of them has hard drive
problems?

A spyware is trying to break into a system by guessing its password. It does not give up until it tries 1 million different passwords. What is the probability that it will guess the password and break in if by rules, the password must consist of (a) 6 different lower-case letters (b) 6 different letters, some may be upper-case, and it is case-sensitive (c) any 6 letters, upper- or lower-case, and it is case-sensitive (d) any 6 characters including letters and digits

A spyware is trying to break into a system by guessing its password. It does not give up
until it tries 1 million different passwords. What is the probability that it will guess the
password and break in if by rules, the password must consist of
(a) 6 different lower-case letters
(b) 6 different letters, some may be upper-case, and it is case-sensitive
(c) any 6 letters, upper- or lower-case, and it is case-sensitive
(d) any 6 characters including letters and digits

A shuttle’s launch depends on three key devices that may fail independently of each other with probabilities 0.01, 0.02, and 0.02, respectively. If any of the key devices fails, the launch will be postponed. Compute the probability for the shuttle to be launched on time, according to its schedule.

2.8) A shuttle’s launch depends on three key devices that may fail independently of each other
with probabilities 0.01, 0.02, and 0.02, respectively. If any of the key devices fails, the
launch will be postponed. Compute the probability for the shuttle to be launched on time,
according to its schedule.

Under good weather conditions, 80% of flights arrive on time. During bad weather, only 30% of flights arrive on time. Tomorrow, the chance of good weather is 60%. What is the probability that your flight will arrive on time?

2.6) Under good weather conditions, 80% of flights arrive on time. During bad weather, only
30% of flights arrive on time. Tomorrow, the chance of good weather is 60%. What is the
probability that your flight will arrive on time?

2.2. 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 still has fully functioning MB and HD?

2.2) 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 still has fully functioning MB and HD?

Command Prompt Tricks: Change the color of the font

• Font Color to Light Green: Type color a
• Font Color to Blue: Type color 1
• Font Color to Light Aqua: Type color B
• Font Color to Light Red: Type color C
• Font Color to Light Purple: Type color D
• Font Color to Light Yellow: Type color E
• Font Color to Light White: Type color F

How to create Array in Java