The mean of 31 results is 60. If the mean of the first 16 results is 58 and that of the last 16 results is 62,

Mean of 31 results = 60

Sum of 31 results $=31 \times 60=1860$

Mean of the first 16 results $=58$

Sum of the first 16 results $=58 \times 16=928$

Mean of the last 16 results = 62

Sum of the last 16 results $=62 \times 16=992$

Value of the 16th result $=$ (Sum of the first 16 results $+$ Sum of the last 16 results) $-$ Sum of 31 results

$=(928+992)-1860$

$=1920-1860$

$=60$