Q14 of 141 Page 8

If the arithmetic mean of x, x + 3, x + 6, x + 9, and x + 12 is 10, the x =

Terms are x, x + 3, x + 6, x + 9, x + 12


No of terms = 5


We know that


Mean



⇒ 50 = 5x + 30


⇒ 5x = 20


⇒ x = 4

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