Question

A class has 40 students, of whom 16 are girls. The class monitor is chosen by drawing one name at random. Find the probability that the monitor is a boy (as a decimal).

A box contains 24 bulbs. The probability of picking a defective bulb at random is \frac{1}{6}. (a) How many bulbs are good? (b) If 6 more good bulbs are added to the box, what is the new probability of picking a defective bulb?

A school surveyed 600 students on how they come to school. The result is shown in the pie chart, with the central angle of each sector marked.