Question

If the mean of the data 11 , 12 , 14, 18 , x+2, x+3, 30, 32, 35 and 41 arranged in ascending order is
30, find x.
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Answer 1

Answer:

the mean of the given data is 30.

ie, (198+2x)÷(10) = 30,

which gives x = 51

Answer 2

Answer:

No. of terms are odd (9)

∴ Median = [(n + 1)/2]th term

= [(9 + 1)/2]th term

= 5th term

∴ Median = x + 4

and Given Median = 24

∴ x + 4 = 24

x = 20