A. 206
B. 200
C. 360
D. 160
Given that, Total amount = Rs.206/-
50p : 20p : 10p = 5 : 9 : 4
As total amount is in rupees convert the paise into rupees.
Say Z is the ratio constant
=> 5Z x 0.5 + 9Z x 0.25 + 4Z x 0.1 = 206
=> Z = 40
The number of 10p coins = 4Z = 4 x 40 = 160