Question

You are surveying people exiting from a polling booth and asking them if they voted independent. The probability (p) that a person voted independent is 20%. What is the probability that 15 people must be asked before you can find 5 people who voted independen

Answer 1

Answer:

Step-by-step explanation:

Let the distribution law followed is exponential law .

mean m = np where n = 15 , p = .2

m = 15 x .2 = 3

probability of 5 successes

= $\frac{e^{-m}m^r}{r!}$

= $\frac{e^{-3}3^5}{5!}$

= .1