If anitha rows 65 km upstream and 105 km down steam taking 13 hours each, then the speed of the stream
Options:
(A) 8.4 kmph
(B) 5.5 kmph
(C) 6 kmph
(D) 8 kmph
(E) 8.2 kmph
--
Speed upstream = 65/13 = 5 kmph
Speed down stream = 105/5 = 21 kmph
Speed of stream = ½ (21-5) = 8 kmph So the answer is: (D).
-----
There are 10 flavors of ice cream, 3 types of nuts and 5 types of fruit at an ice cream store. If a person can choose 2 ice cream flavors as base, 2 types of nuts and 2 types of fruit. How many different variations are possible if repetition is allowed ?
Options:
(A) 150
(B) 250
(C) 22500
(D) 225
(E) 225000
--
Ice cream flavors: 10x10 = 100
Nuts: 3x3 = 9
Fruit: 5x5 = 25
Total = 22500 So the answer is: (C).
-----
During a sale, the price of a pair of shoes is marked down 14% from the regular price. After the sale ends, the price goes back to the original price. What is the percent of increase to the nearest percent from the sale price back to the regular price for the shoes?
Options:
(A) 9%
(B) 10%
(C) 11%
(D) 16%
(E) 90%
--

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Assume the price = 100
Price during sale = 86
Price after sale = 100
Percent increase = 14/86*100 = 16% approx. So the answer is: (D).
-----