Question

In a row of boys, Ajeet is ${12}^{th}$ from the left and Rahat is ${15}^{th}$ from the right. They change their positions. Now, Ajeet is ${19}^{th}$ from the right. What is the total no. of boys in the class ?

• A. $30$
• B. $31$
• C. $32$
• D. $29$

Answer 1

The correct option is A $30$

$\underset{\left(11\text{boys}\right)}{\overset{\text{Left}}{\to }}{12}^{th}$

${19}^{th}\underset{\left(\text{With Ajeet}\right)}{\overset{\text{Right}}{\leftarrow }}$

Initially , Ajeet is at ${12}^{th}$ position

Hence, $11$ boys are on left

After changing Ajeet is at ${19}^{th}$ position from right.

Hence there are $19$ boys (Along with Ajeet) from right side.

$\therefore$ Total boys in class $=11+19$

$=30$
So correct option is A