Find the value of 'x' if the mean of the set of the numbers 8, 5, x, 10, 15, 21 is given as 11.

প্রশ্ন: Find the value of 'x' if the mean of the set of the numbers 8, 5, x, 10, 15, 21 is given as 11.

সমাধান:
ATQ,
(8 + 5 + x + 10 + 15 + 21)/6 = 11
⇒ (59 + x)/6 = 11
⇒ 59 + x = 66
⇒ x = 66 - 59
∴ x = 7