Question

(1 - 1/2)(1 - 1/3)(1-1/4) ....(1-1/20) =

• A. 20/21
• B. 21/20
• C. 1/20
• D. 1/19

Answer 1

Answer:

C. 1/20

(1 - 1/2)(1 - 1/3)(1-1/4) ....(1-1/20)

= 1/2 x 2/3 x 3/4 x ..... x 19/20

= 1/20