9am - 11am - 175
11am - 1pm - 125
1pm - 3pm - 225
3pm - 5pm - 200
5pm - 7pm - 120
The above table shows the number of people visiting the Good-living pavilion in a trade fair during different time of the day.
Find the probablity that the randomly chosen person visited the pavilion.
1. after 1pm but before 5pm
2. between 9am to 1pm
3. after 5pm
4. between 3pm and 5pm.
Please answer this question urgently. My exam is on 20th Thursday.
Thanks
Answers
(i) Between 1pm but before 5pm = 0.5
(ii) Between 9am to 1pm = 0.355
(iii) After 5pm = 0.14
(iv) Between 3pm and 5pm = 0.236
Probability of the person visiting = number of people visiting during the specified time / total number of people visiting the fair
Total number of people visiting the fair = Sum of people visiting between different times
= 175+125+225+200+120
= 845
(i) Between 1pm to 5pm = people between 1pm to 3pm and 3pm to 5pm / total number
= 225+200/845
= 425/845
= 0.502
(ii) Between 9am to 1pm = People between 9am to 11am and 11am to 1pm / total number
= 125+175 / 845
= 400 / 845
= 0.355
(iii) After 5pm = people between 5pm to 7pm / total people
= 120 / 845
= 0.14
(iv) Between 3pm and 5pm = People visiting between 3pm and 5pm / total number
= 200 / 845
= 0.236