Rani had Rs. 18.50. She bought one ice cream for Rs. 11.75. How much money does she have now?

Given:

Rani had Rs. 18.50. She bought one ice cream for Rs. 11.75. 

To do:

We have to find the money she now has.

Solution:

Money Rani had initially $= Rs.\ 18.50$

Cost of the ice cream $= Rs.\ 11.75$

Therefore,

Money left with Rani $=$ Money Rani had initially $-$ Cost of the ice cream

$=Rs.\ 18.50- Rs.\ 11.75$

   $18.50$

$-11.75$

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  $6.75$

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Money left with Rani is $Rs.\ 6.75$.