SOLUTION: a certain insecticide kills 50% of all insects in lab experiments a sample of 11 insects is exposed to the insecticide in a particular experiment what is the probability that exact
Algebra ->
Probability-and-statistics
-> SOLUTION: a certain insecticide kills 50% of all insects in lab experiments a sample of 11 insects is exposed to the insecticide in a particular experiment what is the probability that exact
Log On
Question 375390: a certain insecticide kills 50% of all insects in lab experiments a sample of 11 insects is exposed to the insecticide in a particular experiment what is the probability that exactly 6 insects will survive Answer by ewatrrr(24785) (Show Source):
Hi,
Note: The probability of x successes in n trials is:
P = nCx* where p and q are the probabilities of success and failure respectively.
In this case p & q are = 1/2 or .5
nCx = 11C6 = 462
P(exactly 6 surviving)= 462*(.5)^6(.5)^5 = .2256
