None of the above:
Mean
10+29+15+29+35+2 = 120
120/6 = 20 is the mean
120+27 = 147
147/7 = 21 is the new mean
So mean increases by 1
Median
2 10 15 29 29 35
Write the numbers in order and find the middle number, there is no middle number
2 10 15 27 29 29 35
27 is the middle number
Mode
2 10 15 29 29 35
The repeated numbers are 29
2 10 15 27 29 29 35
The repeated number, your mode is 29