The ${11}^{th}$ term of the AP: $10, 17, 24..........$ is ____________.

Steps to the derived $n^{th}$ term are given below

Here, $a$ (first value) = $10$, $d$ (difference between first and second value)= $17-10=7$, $n=11$

As we know,

 $$\begin{gathered} a_n = a + (n – 1) d \\ {a}_{11} = 10+ (11-1)\times 7 \\ = 10+10\times 7 \\ = 10+70 \\ {a}_{11 }= 80 \end{gathered}$$