If The Mean Of 9, 8, 10, X, 12 Is 15, Find The Value Of X.

1.	If The Mean Of 9, 8, 10, X, 12 Is 15, Find The Value Of X.
Answer» MEAN of the given numbers = (9 + 8 + 10 + x + 12)/5 = (39 + x)/5 According to the problem, mean = 15 (given). Therefore, (39 + x)/5 = 15 ⇒ 39 + x = 15 × 5 ⇒ 39 + x = 75 ⇒ 39 - 39 + x = 75 - 39 ⇒ x = 36 Hence, x = 36. Mean of the given numbers = (9 + 8 + 10 + x + 12)/5 = (39 + x)/5 According to the problem, mean = 15 (given). Therefore, (39 + x)/5 = 15 ⇒ 39 + x = 15 × 5 ⇒ 39 + x = 75 ⇒ 39 - 39 + x = 75 - 39 ⇒ x = 36 Hence, x = 36.

Answer»

MEAN of the given numbers = (9 + 8 + 10 + x + 12)/5 = (39 + x)/5

According to the problem, mean = 15 (given).

Therefore, (39 + x)/5 = 15

⇒ 39 + x = 15 × 5

⇒ 39 + x = 75

⇒ 39 - 39 + x = 75 - 39

⇒ x = 36

Hence, x = 36.

Mean of the given numbers = (9 + 8 + 10 + x + 12)/5 = (39 + x)/5