Probability From a Two-Way Table

Question

Using the table above summarizing test‐taking strategies and scores for 1000 students, what is the probability that a randomly chosen student used the “Guess” strategy?
 
| Strategy        | Score 0–59 | Score 60–79 | Score 80–100 | Total |
|-----------------|------------|-------------|--------------|-------|
| Guess           | 120        | 100         | 80           | 300   |
| Answer (c)      | 50         | 150         | 100          | 300   |
| Longest Answer  | 80         | 200         | 120          | 400   |
| Total           | 250        | 450         | 300          | 1000  |

Accepted Answer

0.30

Answer

0.33

Answer

0.40

Answer

0.25

Rank	User	Correct Count	Attempt Count	Time	Score
#1	abygail.gonzalez69	1	1	0m 11s	89
#2	jonesg	1	1	0m 20s	80
#3	halllais304	1	1	0m 30s	70

Strategy	Score 0–59	Score 60–79	Score 80–100	Total
Guess	120	100	80	300
Answer ©	50	150	100	300
Longest Answer	80	200	120	400
Total	250	450	300	1000

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