Respuesta :
See, 2a + b=7..............(i)
b+ 2c =23.....................(ii)
Adding (i) and (ii)-
2a + 2b +2c =30
2(a+b+c) =30
a+b+c=15
Therefore average =a+b+c/3
=15/3= 5
Hope, this helps!
b+ 2c =23.....................(ii)
Adding (i) and (ii)-
2a + 2b +2c =30
2(a+b+c) =30
a+b+c=15
Therefore average =a+b+c/3
=15/3= 5
Hope, this helps!
Answer:
Option A, 5
Step-by-step explanation:
If 2a + b = 7 and b + 2c = 23
Then we have to find the average of a, b and c.
In other words we have to find the value of [tex]\frac{a+b+c}{3}[/tex]
By adding both the equations
(2a + b) + (b + 2c) = 7 + 23
2a + 2b + 2c = 30
2(a + b + c) = 30
(a + b + c) = [tex]\frac{30}{2}[/tex] = 15
⇒[tex]\frac{(a+b+c)}{3}=\frac{15}{3}=5[/tex]
Therefore, average of a, b and c is 5
Option A, 5 is the answer.
