SOLUTION: 6/ a poll states that 30% of the workers in a large company have new desk, If 4 workers are selected at random, what is the probability that a least one workers has a new desk 7

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Question 474338: 6/ a poll states that 30% of the workers in a large company have new desk, If 4 workers are selected at random, what is the probability that a least one workers has a new desk
7/ In a shipment of 30 televisions, 4 are defective, if 2 television sets are randomly selected and tested without replacement, what is the probability that both are defective.

8/ At one time, Powerball required picking five number from 1to 55 and one number for the powerball from 1-to 42 must be selected. In how many ways can these 6 numbers be selected?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
a)The chances that NONE has a new desk are (.7)4=.2401
The chances that at least one has a new desk =1-.2401=.7599
b)4/30x3/29=.01379..
c)55C5 X 42=(55x54x53x52x51x50!/5x4x3x2x50!)x42=11x13x17x27x53x42=146107962..