Question

Each sample of water has a 35% chance of containing a particular organic pollutant. Assume that the samples are independent with regard to the presence of the pollutant. Find the following a) The probability that, in the next 15 samples, exactly 2 contain the pollutant. (b) The probability that, in the next 15 samples, a minimum of 3 samples contain the pollutant (use the Binomial Tables). (c) The probability that, in the next 15 samples, a maximum of 9 samples contain the pollutant (use the Binomial Tables). (d) The probability that, in the next 15 samples, a minimum of 2 and a maximum of 8 samples contain the pollutant (use the Binomial Tables).

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5