Question

4. The number of electronic devices (phones, laptops, media players,etc) owned by a sample of ten students is: 1, 1, 1, 2, 2, 3, 3, 3, 3, 4. It is stated that this sample has an average of 2.3. This average is known as a:

a. mode

b. median

c. harmonic mean

d. arithmetic mean

e. geometric mean

5. In a school of 320 students, 85 students are in the band, 200 students participate in sports and 60 students do both activities. How many students are not involved in either band or sports?  

a. 225

b. 85

c. 35

d. 95

e. 165

6. In a college where there are 260 students, 93 study Spanish, 95 study Chemistry, 165 study Mathematics, 18 study Spanish and Chemistry, 75 study Chemistry and Mathematics, 20 study Mathematics and Spanish and 15 study all three subjects. What is the probability that a student selected at random studies none of these subjects?

a. 0.000

b. 0.019

c. 0.752

d. 0.037

e. 0.057

Answer 1