The median and mode of a frequency distribution are 26 and 29 respectively. Then the mean is:

Median = 26

Mode = 29

Formula used:
Mode = 3 × Median – 2 × Mean

Solution:
29 = 3 × 26 – 2 × Mean
29 = 78 – 2 × Mean
2 × Mean = 78 – 29 = 49
Mean = 49 ÷ 2 = 24.5