George Is Indifferent Between $100 and a Bet with a 0.6

Multiple Choice

George is indifferent between $100 and a bet with a 0.6 chance of $50 and a 0.4 chance of $200.If U(50) = a and U(200) = b,then U(100) = :

A) 0.4a + 0.6b.
B) 0.6a + 0.4b.
C) (a + b) / 2.
D) a + b.
E) 6a + 4b.