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3 years ago

Class 10R sat a test.

Mathematics

2 answers:

uranmaximum [27]3 years ago

7 0

Answer:

Step-by-step explanation:

Given that there are 30 students in class 10R and the mean marks for the entire class was 70%. Therefore,

total mark of class = 70 x 30 = 2100

Given that there are 20 boys in the class and the mean marks for the boys was 62 %. Therefore,

total mark of boys = 62 x 20 = 1240

To calculate the mean mark for the girls we need to find the total number of girl and total mark of girls.

total number of girl = 30 - 20 (boys) = 10
total mark of girls = total mark of class - total mark of boys = 2100 - 1240 = 860
mean mark for girls = 860 / 10 = 86

Gnesinka [82]3 years ago

5 0

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