A watch, after allowing a discount of 15% on its marked price, was sold at a gain of 20%. Had it been sold after
allowing 25% discount there would have been gain of
Rs. 120. Find the cost price of the watch. ​

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Acircle has a circumference of 7.850 units. what is its radius?