Question

Mere pas 100 rupee the 40 kharch kiy 60 bache 30 kharch kiy 30 bache 18 kharch kiy 12 bache total 102 jabki the sirf 100

Answer 1

a.t.q
100-40=60
then available balance 60
now,
60-30=30
after that ,
30-18 =12 rupee Bache
now mene total kitne karch kiye
100-12
=88 rupee
there is no 102 jabki

Answer 2

I think that your calculation is wrong.
The total money should be
₹ 12 + ₹ 18 + ₹ 30 + ₹ 40 = ₹ 100

You can check your calculation again.

Hope this may help you.

If you have any doubt, then you can ask me in the comments.