1.

Average of n numbers is a. The first number is increased by 2, second one is increased by 4, the third one is increased by 8 and so on. The average of the new numbers is

A. <table><tr><td rowspan="2">a + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2<sup>n-1</sup> - 1</center></td></tr><tr><td style="text-align: center;">n</td></tr></table>
B. <table><tr><td rowspan="2">a + 2</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2<sup>n-1</sup> - 1</center></td></tr><tr><td style="text-align: center;">n</td></tr></table>
C. <table><tr><td rowspan="2">a + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2<sup>n-1</sup></center></td></tr><tr><td style="text-align: center;">n</td></tr></table>
D. <table><tr><td rowspan="2">a + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2<sup>n</sup> - 1</center></td></tr><tr><td style="text-align: center;">n</td></tr></table>
Answer» C. <table><tr><td rowspan="2">a + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2<sup>n-1</sup></center></td></tr><tr><td style="text-align: center;">n</td></tr></table>


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