respected sir/madam
given below is the frequency distribution of wages of 30 workers
wages
110-130
130-150
150-170
170-190
190-210
210-230
230-250
No. Of workers
3
4
5
6
5
4
3
a worker is selected at random. find the probability that his wages are:
1. at least Rs.150
2. at most Rs.190
???
pls. answer fast
| wages | frequency | cumulative frequency |
| 110-130 | 3 | 3 |
| 130-150 | 4 | 7 |
| 150-170 | 5 | 12 |
| 170-190 | 6 | 18 |
| 190-210 | 5 | 23 |
| 210-230 | 4 | 27 |
| 230-250 | 3 | 30 |
| total = 30 |
total number of workers = 30
the number of workers , whose wages are less than 150 = 7
therefore the probability that the his wages is less than 150 = 7/30
therefore the probability that his wages is at least 150 = 1- 7/30 = 23/30
the wages is at most 190, the number of workers whose wages are less than or equal to 190 = 18
therefore the required probability = 18/30 = 3/5
hope this helps you.
cheers!!