twistyjungle914 twistyjungle914

24-09-2020
Mathematics

contestada

the mean marks for a french test in a class of 30 boys and 20 girls are 60 and 70 respectively. find the mean mark for the whole class

Respuesta :

gabriellasuarez35 gabriellasuarez35

24-09-2020

Answer:

30×60=1800

20×70=1400

1400+1800

3200÷(30+20)

3200÷50

64

the mean mark is 64

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