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probability questions
I have some tasks and I don't know how should I solve them.
1) During transporting 3% percent of the goods get damaged. What is the possibility that among 6 chosen goods there will be
a) only one damaged
b) at least one damaged
2) The probability that a massage won't de delivered is 0,2. I have to find a probibility that among 400 masages
a) 90 will be delivered
b) no more then 50 won't be delivered
3) The probability of reaching the second level is 0,8 for the first person and 0,7 for the second. [ksi] is the number of people who reached the second level. I have to find the law of the distribution for [ksi].
P.S. sorry for my English
I have some tasks and I don't know how should I solve them.
1) During transporting 3% percent of the goods get damaged. What is the possibility that among 6 chosen goods there will be
a) only one damaged
b) at least one damaged
2) The probability that a massage won't de delivered is 0,2. I have to find a probibility that among 400 masages
a) 90 will be delivered
b) no more then 50 won't be delivered
3) The probability of reaching the second level is 0,8 for the first person and 0,7 for the second. [ksi] is the number of people who reached the second level. I have to find the law of the distribution for [ksi].
P.S. sorry for my English
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