All categories

2 years ago

Class 10R sat a test.

Mathematics

2 answers:

uranmaximum [27]2 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]2 years ago

5 0

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

You might be interested in

The ratio of mice to snakes in the pet shop is 6:2. There are 42 mice at the pet shop. What is the total number of mice and snak

KATRIN_1 [288]

The answer is B I believe

7 0

2 years ago

Read 2 more answers

a rectangle has a length of 5 cm and width 3 cm. a similar rectangle has length 7.25 cm what is the width in cm of this rectangl

zheka24 [161]

First Rectangle Area: 5 * 3=15
Second rectangle's width: 15/7.5=2
I think this is the ans

4 0

3 years ago

Read 2 more answers

7. The measures of the angles in a triangle are in the extended ratio of 3:4:5. Find the

Mashcka [7]

Answer:

Below.

Step-by-step explanation:

Angle 1 = (3/(3+4+5) * 180 = 3/12 * 180

= 45 degrees.

Angle 2 = 4/12 * 180 = 60 degrees.

Angle 3 = 5/12 * 180 = 75 degrees.

6 0

2 years ago

Please help me Solve for x. Have to show work

REY [17]

A -17 3/4< x so u have to simplify-17 3/4 by multiply 17*4=68+3=71/4 so the x stands for -71/4 and it has to be 4 as the denominator because it it the denominator for the question.
B, C, D are also the same answer-17/4
And for 15 3/4<-2+ x it is also the same answer

6 0

2 years ago

In decimal form, to the nearest tenth, what is the probability that a randomly selected Riverside High School student is in twel

Lunna [17]

We have that the total students there are 500. The 12-graders there are 200. Probability is defined as the ratio of positive outcomes of an event, over all the possible outcomes. Suppose we pick student randomly. Then, there are 200 positive outcomes (positive outcome: we pick a student in 12th grade) and there are totally 500 outcomes (we can pick 500 students in total from Riverside High School). This ratio gives: $P= \frac{200}{500} =0.4$ . The requested probability is 0.40

4 0

2 years ago

Read 2 more answers