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#1 Help Me ! » Can you help me with this problem? » 2007-03-09 22:10:32

scar820
Replies: 1

The Sure Fire Pest Control Company maintains that their rattraps are the most effective in the market. The probability of catching a rat within one day is said to be 90%. If I set four traps, find the probability that;
a)      Three will catch rats
b)     At least two will catch rats
c)      No more than on will catch a rat
d)     What are the mean and standard deviation of this distribution?

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