In a factory, an average of 70 TV's are produced per day for the fist 25days of the months. A few workers fell ill for the next 5days reducing the daily avg for the month to 68 sets/day . The average production per day for day last 5days is ? Pick
A) 20
B) 36
C) 48
D) 50
E) 58

Rationale: "production during these 5 days = total production in a month - production in first 25 days . = 30 x 68 - 25 x 70 = 290 ∴ average for last 5 days = 290 / 5 = 58 e"
Answer: E