Correct Answer - Option 3 : 11
Concept used:
In the tally, | → 1, || → 2, ||| → 3, |||| → 4 and |||| → 5
Calculation:
By observing the above tally table,
The number of athletes completed the race in 12 seconds = 5 + 5 + 1 = 11
∴ 11 athletes completed the race in 12 seconds