Question

the mean mark obtainedby a class of 40 students is 65. the mean Mark's of half of the students is found to be 45. the mean Mark's of the remaining student is
a) 85
b) 60
c) 70
d) 65​

Answer 1

Answer:

85

Step-by-step explanation:

Total marks =40*65=2600

Marks of half =20*45=900

Marks of remaining=2600-900=1700

Mean =1700/20=85