Question

The average mark of 40 student of section is 80 and that of average mark of 50 student of section b is 60 what is the average mark of what section

Answer 1

Answer:

Answer is 68.88

Step-by-step explanation:

Average marks of 40 students=80 that is sum of the marks of 40 students /40=80. Then sum of marks 40 students =3200 Average marks of 50 students =60. Sum of the marks of 50students=3000 then sum of the marks of 90 students is=3000+3200=6200 then. Average marks of 90 students=6200/90=68.88