Following chart shows marks obtained by students in Geography examination. If first division is awarded for 60 or above marks, find the number of students who got first division in the exam.

From among a group of 6 men, 4 women and 5 children, 3 individuals are selected randomly. What is the probability that exactly 2 among the chosen are children?

Anthony purchased 2800 bulbs for his shop at $20 each. During transportation 280 bulbs got damaged, and he sold remaining bulbs at price of $28 each. Find overall profit/loss in %.

A room that is 24.5 m wide and 31.5 m in length is to be completely carpeted with a carpet that is 0.35 m wide. What is the length of the carpet needed (in m)?

It takes machine M, x hours to manufacture a deck of cards that machine N can manufacture in y hours. If machine M operates alone for z hours and is then joined by machine N until 70 decks are finished, for how long will the two machines operate simultaneously?