BMST Data Interpretation and Probability 2 — Questions and Answers
Question 1: A bar chart shows monthly sales: Jan=120, Feb=95, Mar=150, Apr=110. What is the mean monthly sales?
- 118.75 (Correct answer)
- 120
- 110
- 125
Correct answer: 118.75
Mean = (120+95+150+110)/4 = 475/4 = 118.75.
Question 2: A bag contains 4 red, 6 blue, and 2 green marbles. What is the probability of drawing a blue marble?
- 1/2 (Correct answer)
- 1/3
- 2/3
- 1/6
Correct answer: 1/2
P(blue) = 6/12 = 1/2.
Question 3: A pie chart shows 40% of students prefer math, 35% prefer science, and 25% prefer English. If there are 200 students, how many prefer science?
- 70 (Correct answer)
- 80
- 50
- 65
Correct answer: 70
35% of 200 = 0.35 × 200 = 70 students.
Question 4: A line graph shows temperatures (°F): Mon=72, Tue=68, Wed=75, Thu=70, Fri=73. What is the median temperature?
- 72 (Correct answer)
- 70
- 73
- 71.6
Correct answer: 72
Ordered values: 68, 70, 72, 73, 75 — the middle value is 72.
Question 5: Two dice are rolled. What is the probability that the sum equals 7?
- 1/6 (Correct answer)
- 1/12
- 1/9
- 7/36
Correct answer: 1/6
There are 6 ways to get a sum of 7 out of 36 total outcomes: 6/36 = 1/6.
Question 6: A table shows quiz scores: 85, 90, 78, 92, 88, 76, 95. What is the range of these scores?
- 19 (Correct answer)
- 21
- 17
- 15
Correct answer: 19
Range = highest − lowest = 95 − 76 = 19.
Question 7: A spinner has 8 equal sections numbered 1–8. What is the probability of landing on an even number?
- 1/2 (Correct answer)
- 3/8
- 5/8
- 1/4
Correct answer: 1/2
Even numbers 2,4,6,8 = 4 sections out of 8, so P = 4/8 = 1/2.
BMST Data Interpretation and Probability 2
A bar chart shows monthly sales: Jan=120, Feb=95, Mar=150, Apr=110.
What is the mean monthly sales?