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The average of a and b is 10, average of b and c is 12 and average of c and a is 15. What is the average of a, b and c? |
$\frac{37}{3}$ $\frac{74}{3}$ 74 37 |
$\frac{37}{3}$ |
Sum of a & b = 2 × 10 = 20 Sum of b & c = 2 × 12 = 24 Sum of c & a = 2 × 15 = 30 2 ( a + b + c ) = 74 a + b + c = \(\frac{74}{2}\) = 37 Average of ( a + b + c ) = \(\frac{37}{3}\) |
