Christine and Siri have 21rs between them. Christine has 20rs more than Siri. How much does Christine have.
Select the correct option: A) 16.5 B) 17.5 C) 18.5 D) 19.5 E) 20.5

Rationale: let siri has x rs , then christine has 20 + x rs given x + ( 20 + x ) = 21 = > 2 x = 1 or x = 0.5 so christine and siri has 20.5 and 0.5 rs respectively . answer : e
Answer: E