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Out of 6 numbers, the sum of the first 5 numbers is 11 times the 6th number. If their average is 144 then the 6th number is? |
104 72 78 92 |
72 |
Let 6th number = x sum of 5 numbers = 11x \(\frac{11x + x}{6}\) = 144 ⇒ 12 x = 144 × 6 x = 72 |
