(i) If two coins are tossed at the same time the possible outcomes are :
S = (H,H), (H,T), (T,H), (T,T) i.e. n(S) = 4
So, the probability of each occurrence =
Thus, the given statement is wrong.
The table below shown the salaries of 280 persons:
Salary (In thousand) | No. of Person |
5-10 | 49 |
10-15 | 133 |
15-20 | 63 |
20-25 | 15 |
25-30 | 6 |
30-35 | 7 |
35-40 | 4 |
40-45 | 2 |
45-50 | 1 |
Calculate the median salary of the data.
The mean of the following distribution is 18. Find the frequency f of the class 19-21.
Class | 11-13 | 13-15 | 15-17 | 17-19 | 19-21 | 21-23 | 23-25 |
Frequency | 3 | 6 | 9 | 13 | f | 5 | 4 |
The following distribution gives the daily income of 50 workers of a factory:
Daily Income (In) | 100-120 | 120-140 | 140-160 | 160-180 | 180-200 |
Number of workers | 12 | 14 | 8 | 6 | 10 |
Convert the distribution above to a less than type cumulative frequency distribution and draw its ogive.