SOLUTION: Pat does a lot of travelling in her car, and she keeps records on how often she fills her car with petrol. The table alongside shows frequencies of the number of days between refil
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Question 1189009: Pat does a lot of travelling in her car, and she keeps records on how often she fills her car with petrol. The table alongside shows frequencies of the number of days between refills. Estimate the probability that:
Chart: Days between refills: Frequency
1:37
2:81
3:48
4:17
5:6
6:1
a. There is a 4 day gap between refills (simply 17/190=0.0895)
b. There is at least a four day gap between refills. Don't understand this part.
Answer by greenestamps(13209) (Show Source): You can put this solution on YOUR website!
At least 4 days means 4 or more; in this example, 4, 5, or 6. So
(17+6+1)/190
Convert to whatever form you need.
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