Question

If the arithmetic mean of x, x+2, x+5, x+9 and x + 10 is 10, then x is —​

Answer 1

Step-by-step explanation:

mean= total sum of observations / total number of observations

here ,

mean = x+(x+2)+(x+5)+(x+9)+(x+10) =10

5x+16=10

5x= -6

x=-6/5

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