There are 400 students in a school hall. 240 of them are boys. How many percent more boys than girls are there?

Mathematics

1 answer:

PilotLPTM [1.2K]3 years ago

7 0

Answer: 20 percent

The school hall is 60 percent boys and 40 percent girls.

You might be interested in

20 randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions - all on the same m

valentinak56 [21]

I think that this an example of a paired t test. Since each student (subject) is given 2 treatments of the same material.

4 0

3 years ago

The average of 8 numbers is 10. the average of 6 of the numbers is 12 what is the average of the other 2 numbers

omeli [17]

So, all 8 numbers added up would equal 80. and all 6 numbers added up would equal 72. The subtract them. 80-72 is 8. Then divide by 2 because there are 2 numbers. 8/2 is 4. (4 is your answer)

7 0

4 years ago

Can u help me with number 4 ?

Sati [7]

Answer: um how can l help you with 4

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What is the zero in the quadratic function f(x)= 9x^2-54x-19?

Alex17521 [72]

Answer:

6.33... and 0.333...

Step-by-step explanation:

The quadratic formula is

$x=\frac{-b+\sqrt{b^2-4ac} }{2a}$ .

It is important because while some quadratics are factorable and can be solved not all are. The formula will solve all quadratic equations and can also give both real and imaginary solutions. Using the formula will require less work than finding the factors if factorable. We will substitute a=9, b=-54 and c=-19.

$x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}\\x=\frac{-(-54)+/-\sqrt{(-54)^2-4(9)(-19)} }{2(9)}\\x=\frac{54+/-\sqrt{2916+684} }{18}$