Si X → n(25, 49) ; Hallar:
P[25 ≤X ≤ 46]
ii) P[X ≥ 39]
Respuestas a la pregunta
Respuesta:
a) 21*3 = 7*9 21/7 = 9/3
21 ; 7 ; 9 ; 3
b) 5*24 = 8*15
5/8 = 15/24
5 ;8 ;15 ; 24
c) 3*45 = 5*27
3/5 = 27/45
3; 5 ; 27 ; 45
4) a) 3/5 = 21/35
3/5 = 24/40
3/5 = 27 / 45
3/5 = 30 / 50
b) 4/9 = 16/36
4/9 = 20 / 45
4/9 = 24/54
4/9 = 28/63
5) a) x/y = 5/4 x+y = 27
x = 5/4y
5/4y + y = 27
9/4y = 27
y = 27*4/9
y = 12
x = 5/4*12 = 15
Explicación:
x/3 = y/5 = z/6 x + y+ z = 98
x/3 = y/5 y = 5/3x
x/3 = z/6
z = 2x