If the arithmetic mean of 5, 4, x, x + 3, 9 and 8 is 6, find out value

1.	If the arithmetic mean of 5, 4, x, x + 3, 9 and 8 is 6, find out value of x. अगर 5, 4, x, x + 3, 9
Answer» Answer : x = 3.5 Step-by-step explanation : $\underline{\underline{\bf Mean:}}$ ⇒ It is the average of the numbers. ⇒ Add up all the terms and DIVIDE the number of terms in the DATA set. ⇒ The mean of x₁, x₂, x₃ ,..., xₙ $Mean=\frac{x_1+x_2+x_3+.....+x_n}{n}$ $\boxed{\bf Mean=\frac{sum \ of \ observations}{number \ of \ observations} }$ GIVEN, The arithmetic mean of 5, 4, x, x + 3, 9 and 8 is 6 $\bf \frac{5+4+x+x+3+9+8}{6} =6 \\\\ \frac{29+2x}{6} =6 \\\\ 29+2x=6\times6 \\\\ 29+2x=36 \\\\ 2x=36-29 \\\\ 2x=7 \\\\ x=7/2 \\\\ x=3.5$ ║ The value of x is 3.5