SCAT Data Interpretation and Probability 2

Question 1

A bar graph shows monthly sales: Jan=40, Feb=55, Mar=35, Apr=70. What is the mean monthly sales?

Accepted Answer

50

Answer

Mean = (40+55+35+70)/4 = 200/4 = 50.

Question 2

A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of NOT picking a blue marble?

Accepted Answer

2/5

Answer

Non-blue marbles = 3+2 = 5 out of 10 total, so probability = 5/10 = 2/5.

Question 3

A pie chart shows 25% of students prefer math, 40% science, 20% English, and 15% history. If there are 200 students, how many prefer science?

Accepted Answer

80

Answer

40% of 200 = 0.40 × 200 = 80 students.

Question 4

Two fair coins are flipped. What is the probability of getting exactly one head?

Accepted Answer

1/2

Answer

Outcomes with exactly one head: HT and TH out of {HH, HT, TH, TT} = 2/4 = 1/2.

Question 5

A line graph shows temperatures: Mon=72°, Tue=68°, Wed=75°, Thu=71°, Fri=74°. On which day was the temperature lowest?

Accepted Answer

Tuesday

Answer

Tuesday's temperature of 68° is the lowest value in the data set.

(SCAT) School and College Ability Test Practice Test