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

......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

You might be interested in

A rectangle's area is given by the expression 6n2 – n + 9. The width of the rectangle is 3n2. Which expression represents the le

arlik [135]

Area=(length)*(width)
(6n^2-n+9)=(length)*(3n^2)
length=(6n^2-n+9)/(3n^2)

7 0

3 years ago

Read 2 more answers

If you do not know it plz do not answer

kumpel [21]

385 miles

Step-by-step explanation:

440/16 = x/14