a batsman in his 17 th innings makes a score of 80 , and thereby increases his average by 2 . what is his average after the 17 th innings ? he had never been ’ not out ’ .
"average score before 17 th innings = 80 - 2 × 17 = 46 average score after 17 th innings = > 46 + 2 = 48 answer : a"
add(subtract(80, multiply(2, 17)), 2)