In a row of thirty boys, A is tenth from the right and B is seventh from the left end. How many boys are there between A and C, if C is third to the right of B?
Solution
✅ Correct Option: 1
A is $30-10+1=21$st from the left. B is 7th, so C is 10th from the left. The number between positions 10 and 21 is $21-10-1=10$.