Question

If a = 5, what is value of b + c?
I) a is the average of the set {a, b, c}
II) ab + ac = 10​

Answer 1

Step-by-step explanation:

If a = 5, what is value of b + c?

I) a is the average of the set {a, b, c}

II) ab + ac = 10

Ans 2: D

(I) Sufficient. This statement tells us that (a + b + c)/3 = 5, which means that a + b + c = 15. We know that a = 5, so b + c must equal 10.

(II) Sufficient. Knowing that a = 5, this statement tells us that 5b + 5c = 10. Divide both sides by 5 to find that b + c = 2.

hope this helps you ☺️

Answer 2

Answer:

2

Step-by-step explanation:

5*b + 5*c =10

b=0

c=2

b+c=2