Steps: 2 Marks
Formula: 1 Mark
Answer: 1 Mark
Suppose, the man sold x shares.
S.P. of x shares = Rs 90x (sold at 10% discount)
S.P. of x shares sold at 10% premium = Rs 110x
No. of shares (each of Rs 50) that can be purchased with Rs 90x = 90x33
Now, income on one Rs 100 share is Rs 15,
∴ Income on Rs 50 will be Rs 152
Hence, Annual income = Rs(152×90x33)=Rs225x11
No. of shares (each of Rs 50) that can be purchased with Rs 110x = 110x33
Annual income = Rs(152×110x33)=Rs 25x
25x−225x11=450⇒x=99