Question

The probability of a man hitting a target is 0.25. He shoots 7 times. What is the probability of his hitting at least twice?

Answer 1

Answer:

Step-by-step explanation:

P(i) =P(hitting i times)

P(hitting at least twice) = P(2) + P(3) + P(4) + P(5) + P(6) + P(7)=

(0.25)^2*(0.75)^5 +( 0.25)^3*(0.75)^4 +

(0.25)^4*(0.75)^3 + (0.25)^5*(0.75)^2 +

(0.25)^6*(0.75) + (0.25)^7 =

= 0.0222167969