Shubham's mother is the sister-in-law of Shashi and Shashi is the only daughter of Parmeshwar. Ravi is Shubham's brother. How is Shashi related to Ravi?
In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation.
If '+' means 'divided by', '' means 'multiplied by', 'x' means 'minus' and ' ÷ ' means 'plus', which of the following will be the value of the expression: