question_answer

In an AP if \[\mathbf{a}=-\mathbf{7}.\mathbf{2},\text{ }\mathbf{d}=\mathbf{3}.\mathbf{6}\]and\[{{a}_{n}}=7.2\], then find n.

A) 3                         

B)      4

C) 2                          

D)     5

E) None of these