Question

Average marks obtained by 15gurls of a class were 40while average marks of 10boys of the same class in the same test were 45 what is the average of class of 25students

Answer 1

Answer:

42.5

Step-by-step explanation:

because 45 +40=85 out of 200 so

42.5 is my answer

Answer 2

Step-by-step explanation:

Average of girls = 40

= Total marks/ No. of students

= 15(40)/15

Average of boys = 45

= Total marks/ No. of students

= 10(45)/10

Total average = Total marks of boys and girls / Total no. of students

= [15(40)+10(45)]/25

= 600+450/25

= 1050/25

= 42