Problem: the average of 6 no . ' s is 3.95 . the average of 2 of them is 4 , while the average of theother 2 is 3.85 . what is the average of the remaining 2 no ' s ?
Rationale: "sum of the remaining two numbers = ( 3.95 * 6 ) - [ ( 4 * 2 ) + ( 3.85 * 2 ) ] = 8 required average = ( 8 / 2 ) = 4 e"
annotated_formula: divide(subtract(multiply(6, 3.95), add(multiply(2, 4), multiply(2, 3.85))), 2)