The average of 45 results is 25 and the average of other 25 results is 45 . what is the average of all the results?
Choose the most appropriate option
A) 24
B) 32
C) 48
D) 50
E) none

Rationale: "answer sum of 70 result = sum of 45 result + sum of 25 result . = 45 x 25 + 25 x 45 = 2250 / 70 correct option : b"
Answer: B