Kritesh purchased 700 bulbs for his shop at Rs20 each. During transportation 140 bulbs got damaged, and he sold remaining bulbs at the price of Rs28 each. Find overall profit/loss in percentage.

Some workers are painting a hall with length, breadth and height of 50 m, 50 m and 8 m respectively. If they can paint 100 m^{2} area from one liters of paint, find the amount of paint required to paint the walls and ceiling of hall.

The graph below shows the temperature (in degrees Celsius) over 10 weeks in Singapore and Hong Kong. Find the difference in temperature of two cities in the week when difference is maximum.

Number of students in a college increases by 10% every year. If there are 8000 students in the college, find the number of students in college after 2 years.

Rachel is participating in a race. The probability that she will come first in the race is 0.15. The probability that she will come second in the race is 0.1. The probability that she will come in 3rd is 0.6, and the probability that she will be 4th is 0.15. What is the probability that she will win 2nd position or win the race?