Answer:
A ) The selling price of radio is $ 81.64
B ) The selling price of microscope is $ 72.94
Explanation:
Given as :
A ) Market price of radio = M.P = $ 125.60
Let The selling price of radio = S.P = $ x
The discount = 35 %
So, Discount % =

Or,
=

Or,
= 1 -
Or,
=
Or,
=
∴ x =

I.e x = $ 81.64
So, The selling price of radio is $ 81.64
B ) The market price of microscope = M.P = $ 96.25
The discount = 20 %
Tax percentage = 6 %
Let the selling price of microscope = $ y
Now, So, Discount % =

Or,
=

Or,
= 1 -
Or,
=
Or,
=
∴ y =

I,e y = $ 77
Again Tax of 6% is added
So , $ 77 - 6 % of $ 77
Or, $ 77 × 0.94 = $ 72.38
∴ The final cost of microscope after discount and tax is $ 72.94
Hence A ) The selling price of radio is $ 81.64
And B ) The selling price of microscope is $ 72.94 Answer