Question

Wor
34
dont2
0. A class has 20 students and the average scoring is 45 marks. If the class average is to
be increased to 55 marks, how much must be the increase in total marks of the class?
(I.T.I., Radio & T.V. Mech., Electronics Mech .)
not is 66. If the 5th student is also included, then​

Answer 1

Answer:

i don't know it is not for a my class