Question

The median of the observations 11, 12, 14, 18, x + 2, 22, 22, 25 and 61, arranged in ascending order, is 21. Then, value of 3x + 7 is:

• A. 50
• B. 57
• C. 64
• D. 67

Answer 1

Answer:

C. 64

Solution:

Concept used:

The median is the middle value of a data set.

Calculation:

According to

the given dataset, x + 2 is the middle value which is the median,

So, x + 2 = 21

⇒ x = 19

Then, the value of 3x + 7 = $(3\times{19}+7) = 64$

∴ The correct answer is 64