the average score of a cricketer in 10 matches is 60 and in other 15 matches is 70 . then find the average score in all the 25 matches ?
"average in 25 matches = ( 10 * 60 + 15 * 70 ) / 10 + 15 = 66 answer is d"
divide(add(multiply(10, 60), multiply(15, 70)), 25)