সব প্রশ্নে ফিরে যান
Math
Rahim average 70 in his first m number of exams. After taking n more exams, he had an overall average of 75. In items of m and n his average for last n exams was
A) (5m+75)/n
B) (5m/n)+75
C) (5n/m)+75
সঠিক উত্তর
D) (70m+75n)/(m+n)