Problem-Solving and Data Analysis - Probability and Conditional Probability — Quiz 1

Questions in this quiz (10)

1. A club has $$60$$ members, $$15$$ of whom play the piano. If one member is selected at random, what is the probability that the selected member plays the piano?

   • $$\frac{1}{60}$$
   • $$\frac{15}{60}$$
   • $$\frac{45}{60}$$
   • $$\frac{60}{60}$$

2. A warehouse received a shipment of $$500$$ laptops, $$10$$ of which were damaged. If a laptop is selected at random, what is the probability that it is damaged?

   • $$0.02$$
   • $$0.2$$
   • $$0.5$$
   • $$2$$

3. There are $$30$$ balls in a box: $$12$$ red, $$6$$ blue, and $$12$$ green. If one ball is selected at random, what is the probability of selecting a blue ball?

   • $$\frac{6}{30}$$
   • $$\frac{12}{30}$$
   • $$\frac{18}{30}$$
   • $$\frac{24}{30}$$

4. The table shows the number of pencils by color. If one pencil is chosen at random, what is the probability that it is black?

   • $$\frac{14}{30}$$
   • $$\frac{9}{30}$$
   • $$\frac{7}{30}$$
   • $$\frac{23}{30}$$

5. The data set is: $$-5,2,7,10$$ If one number is selected at random, what is the probability that the number is negative?

   • $$0$$
   • $$\frac{1}{4}$$
   • $$\frac{2}{4}$$
   • $$1$$

6. A survey of $$150$$ customers is summarized below. If one customer is selected at random, what is the probability that the customer is at least $$30$$ years old?

   • $$\frac{50}{150}$$
   • $$\frac{60}{150}$$
   • $$\frac{100}{150}$$
   • $$\frac{150}{150}$$

7. A survey of $$800$$ students recorded whether they own a tablet. The results are shown below. | Own tablet | Do not own tablet Males | $$240$$ | ? Females | $$200$$ | $$160$$ How many males surveyed do not own a tablet?

   • $$200$$
   • $$240$$
   • $$200$$
   • $$400$$

8. Of the $$10$$ fruits in a basket, $$6$$ are apples. If one fruit is selected at random, what is the probability that it is an apple?

   • $$\frac{1}{10}$$
   • $$\frac{3}{5}$$
   • $$\frac{4}{10}$$
   • $$\frac{6}{10}$$

9. In a factory, $$18$$ out of every $$90$$ items produced are defective. If one item is selected at random, what is the probability that it is defective?

   • $$\frac{1}{5}$$
   • $$\frac{18}{90}$$
   • $$\frac{90}{18}$$
   • $$\frac{18}{9}$$

10. On a street with $$12$$ houses, $$3$$ houses have solar panels. If one house is selected at random, what is the probability that it has solar panels?

    • $$\frac{1}{12}$$
    • $$\frac{3}{12}$$
    • $$\frac{9}{12}$$
    • $$\frac{12}{12}$$