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

Q: Answer-If the arithmetic mean of x, x + 3, x + 6, x + 9 and x + 12 is 10, then x = ?

ATQ, We are given that the arithmetic mean of the numbers x, x3, x6, x9, x12 is 10. To find the sum add all the numbers xx3x6x9x12 5x36912 5x30 By using the arithmetic mean formula- So, Multiply both sides by 5 5x30 50 Subtract 30 5x 20 x 4

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ATQ,

We are given that the arithmetic mean of the numbers: x, x+3, x+6, x+9, x+12 is 10. To find the sum add all the numbers: x+(x+3)+(x+6)+(x+9)+(x+12) = 5x+(3+6+9+12) = 5x+30 By using the arithmetic mean formula:- So,

Multiply both sides by 5: 5x+30 = 50 Subtract 30: 5x = 20 ⇒ x= 4

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

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