dlakewilson909 dlakewilson909

24-03-2022
Mathematics

contestada

50 students each did a mathematics test. the mean score for these 50 students was 8.4. there were 30 boys. the mean score for these bots were 8.25. workout the mean score for the girls.

Respuesta :

isalep93 isalep93

24-03-2022

[(30 x 8,25) + (20 x n)] / 50 = 8,4

247,5 + 20 x n = 420

n = (420 - 247,5) : 20

n = 8,625

Answer Link

Otras preguntas

Reorder the elements aluminum, oxygen, fluorine, calcium, and hydrogen from the least to the greatest number of protons. Use the periodic table if needed.

After the September 11 attacks, NATO invoked Article 5 of its treaty which stated that allied nations must support a. a nation under attack. c. a nation attacki

por la ___ tengo biologia

how did the british perception of children change over the course of the 19th century

30,000 is how many times as much as 30?

how do you write eight hundred and five thousandths in decimal please awnser

if Perry drove from charlotte to chicago by way of cincinnati find the distance?

3(x-4)=5(x+2) a. x=11 b. x=-11 c. x=1 d. x=-1

is 897,100 rounded to the nearest ten thousand 900,000?

long tubes that carry water and sugar from leaves to the resr of the plant are known as