CTS Company Numerical Ability Profit and Loss

A man bought a mobile and a laptop for Rs. 78000. He sold the mobile at a gain of 25% and the laptop at a loss of 15%, thereby gaining 5% on the whole. Find the cost price of mobile.
1) Rs. 39000
2) Rs. 34000
3) Rs. 30000
4) Rs. 38000
5) Rs. 32000

Read Solution (Total 2)

Let the cost price of mobile be Rs. x and laptop be Rs.(78000-x)
x * 25/100 - (78000-x) * 15/100 = 78000 * 5/100
25x + 15x – 78000 × 15 = 78000 × 5
40x = 78000 × 20
x = Rs. 39000
8 years agoHelpfull: Yes(6) No(0)

1) Rs. 39000

If cost price of a mobile=x and a laptop=y, then
x + y=78000 ----(i) and
(x*125/100) +(y*85/100) =78000*105/100 or 1.25x + 0.85y=81900 ----(ii)
On solving (i) & (ii), x=39000 , y=39000
8 years agoHelpfull: Yes(3) No(0)

CTS Other Question

Two candles of the same height are lighted at the same time. The first is consumed in 6 hours and the second in 4 hours. Assuming that each candle burns at a constant rate, in how many hours after being lighted, was the first candle was twice the height of the second?
1) 3.5 hrs
2) 2 hrs
3) 4 hrs
4) 3 hrs
5) 2.5 hrs What is the age of teacher?
(A) There are 14 students in a class.
(B) The average age of students and teacher is 16 years.
(C) The average of 14 students is 3 less than the average age of 14 students and teacher.
1) Both (A) and (B)
2) All (A), (B) and (C)
3) Both (B) and (C)
4) Both (A) and (C)
5) None