1.

What is the average of first 15 multiples of 12?1). 962). 663). 14404). None of these

Answer»

FIRST 15 multiples of 12 are 12, 24, 36… 180

⇒ SUM of all multiples = 12 + 24 + 36 + ... + 180 = 12(1 + 2 + 3 + … + 15) = 12 × 120 = 1440

∴ Average = 1440/15 = 96


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