Soit la série statistique suivante pondérée par des coefficients: Valeurs 10 30 10 4 9 3
Coeff. 1 4 2 1 4 3

Calculer pour cette série statistique

la moyenne :
la valeur maximale :
la valeur minimale :
l'étendue statistique :

s'il vous plais aides moi

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.