Question

WHAT IS MEAN AND WHAT IS A.P

Answer 1

abbreviation for Advanced Placement (= a program for students offering courses that are equal to college courses): Students' decisions to either take or avoid AP courses have fundamental effects on their college attendance. Subjects & disciplines.

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Answer 2

mean can be said as the average of total decided by its number
for eg of mean of 15,20,30 is 15+20+30/3=65/3=21.66
while A.P is arithmetic progression which means a common pattern of change in numbers according to the common difference