Question

3) If the mean of 9, 11, 13,x, 18, 19 is x. Find x
​

Answer 1

Step-by-step explanation:

Solution



Verified by Toppr

⇒  The given numbers are 9,11,13,x,18,19

⇒  Number of observation =6

⇒  Mean =x

∴  x=69+11+13+x+18+19

∴   x=670+x

∴   6x=70+x

∴  5x=70

∴  x=14