The average score of class P, Q & R are 76 , 63 , 95 . The ratio of number of students in three classes is 27 , 36 and 45 respectively. Find the combined average of the all three classes ( approx ). |
76.81 73.99 79.58 74.23 |
79.58 |
P : Q : R Ratio No. of students 27 : 36 : 45 3 : 4 : 5 Average 76 63 95 Total Sum 228 252 475
Average of P, Q & R (combined) = \(\frac{228 + 252 + 475}{12}\) = 79.58 |