Question
If the average cost price of 10 identical watches
decreases by Rs. 10 after replacing one watch with a new watch that costs Rs. 150, what was the original cost price of the replaced watch?Solution
ATQ;
Let the cost price of each watch be Rs. 'x'.
So, cost price of 10 watches = Rs. 10x
ATQ:
(10x - x + 150) ÷ 10 = x - 10
Or, 9x + 150 = 10x - 100
Or, x = 250
So, the cost price of the watch that was removed is Rs. 250.
Which cities will be the main focus during Sri Lanka's National Poson Week?
Which international body ruled that the UK’s separation of the Chagos Islands from Mauritius was unlawful?
Who were the cricketing greats after whom the gates were named at the Sydney Cricket Ground (SCG)?
What is notable about the co-branded credit card partnership between Adani One and ICICI Bank?
"Mount Kangto" is the highest point of which Indian state?
Indian Army’s new uniform is Designed by which of the following?
Recently Google announced a third-party ‘in-application (app)’ billing system pilot will be extended to India and four other markets, which ...
My11Circle has appointed whom as its brand ambassadors?
The 52nd Annual Conference of RSSDI, one of the largest gatherings of diabetes experts, is expected to host how many participants?
India's first home-grown gene therapy for cancer, launched by the President of India, was developed through a collaboration between which institutions?
