If `2a+b=7 and b+2c=23`, what is the average of a, b, and c?

Let a, b and c be numbers with altbltc such that the average of a and b is 2, average of b and c is 4, and the average of a and c is 3. What is the average of a, b and c?

The average of a, b, c, d, and e is 28. If the average of a, c, and e is 24, what is the average of b and d?

If 7c+8b=15and 3b-c=2, what is the value of b ?

The average of a, b, c, and d is p. If the average of a and c is q, what is the average of b and d in terms of p and q?

if 2^(a)2^(b)2^(c)=256, vthen the average of a,b,c is

If the average (arithmetic mean) of k and k+7 is b and if the average of k and k-11 is c, what is the sum of b and c?

If a+b+c=9 and a b+b c+c a=23 , find the value of a^2+b^2+c^2

Average age of A and B is 20 years. B and C is 18 years. A and C is 21 years. What is the average age (in years) of A, B and C?