Question

Mary got a job with a starting salary of Rs. 15000/- per month. She will get an
increment of Rs. 100/- per month. What will be her salary after 20 months?​

Answer 1

Heya!!

Here's your answer!

Mary's starting salary = 15000

and increment every month = 100.

This forms an AP. 15000, 15100, 15200, ........

with first term a = 15000 and

common difference d = 100

Now we find sum up to 20 terms.

15000 + 15100 + 15200 + ...... up to 20 terms

${n}^{th} \: </em><em>term</em><em>\: </em><em>of</em><em> </em><em>\: </em><em>A.</em><em> </em><em>P</em><em>\: </em><em>is </em><em>\:$

$a_{n} \: = \: a + (n - 1)d$

$a_{20} = 15000 + 19 \times 100 \\ = 16900$

Glad help you,

it helps you,

thanks.

Answer 2

Answer:

your answers is

a=15000. d=100 N=20