Discuss Forum
1. If two mixers and one TV cost Tk.7000, while two TVs and one mixer cost Tk.9800, the value of one TV is--
- A. 4200
- B. 4200
- C. 4200
- D. 4200
Answer: Option A
Explanation:
The correct option is C Rs. 4200
Let C.P. of a mixer be Rs. x and that of a T.V. be Rs. y.
Then, 2x+y = 7000 and 2y+x = 9800.
Multiplying
2
n
d
equation by 2 and subtracting from it, we get
3y = 19600-7000 = 12600 or y = 4200
∴
C.P. of a T.V. = Rs. 4200
Let C.P. of a mixer be Rs. x and that of a T.V. be Rs. y.
Then, 2x+y = 7000 and 2y+x = 9800.
Multiplying
2
n
d
equation by 2 and subtracting from it, we get
3y = 19600-7000 = 12600 or y = 4200
∴
C.P. of a T.V. = Rs. 4200
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