If two elements are dropped from set X {-10, -8, 0, 6, 7}, what will be the percentage change in its mean?

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If two elements are dropped from set X {-10, -8, 0, 6, 7}, what will be the percentage change in its mean?

1) The median of the set will remain the same
2) The range of the set will decrease by 3

The OA is B
Source: — Data Sufficiency |