Question

the avg score in the math of aclass increased by 10% if the total marks secured by a no. of students who form 20% of the class strength and whose avg score is 48 is not included in the calculation. what is the average score​

Answer 1

Answer:

(100x - 960) / 80 = (110x/100)

5(100x - 960) = 4 * 110x

500x - 5 * 960 = 440x

500x - 440x = 5 * 960

60x = 5 * 960

dividing both sides by 60,

x = 5 * 16

x = 80 (Ans.)