Question

x New Tab Canvas → XCO Question 5 7 pts You may find the following files helpful throughout the exam: Statistics Equation Sheet Standard NormalTable An archer is shooting arrows at a target. She hits the target 77% of the time. If she takes 20 shots at the target, what is the probability that she will hit the target exactly 15 times? BIASA-I EE2XXEE ECT T 12pt Paragraph

Answer 1

Let x X bl a sandom vanable denoting the no of timis Archer shoot the target and it is given she hit the target 774. of time i € = 12 20.77 loo and she te ky n=w shot that 2

then here x will be a Binomial with parameter no PE 0.77 4 X ie Xu Bl:20, 0.77) and we know that if xu Blue) then et P ( X = x) = h P" (1-P) smul Here xn B(20, 0.77) So plexactly it hita) PL X= 10) 20I C 40177] [1-0.77) tf 1550¢voro19-834*0.000613.6. 0449789 exactly 18 hitt) = 0.19789 20