Please help I can not find the answer

Its D. 10

Step-by-step explanation:

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Given:

The given sets are:

Set a : 200, 104, 100, 160.

Set b: 270, 400, 483, 300, x.

Mean of set a: mean of set b= 3:8

To find:

The value of x.

Solution:

Formula for mean:

The mean of set of a is:

The mean of set of b is:

It is given that,

Mean of set a: mean of set b= 3:8

Isolate the variable x.

Divide both sides by 3.

Therefore, the value of x is 427.