Wired Faculty
Two coins are tossed simultaneously 300 times. The frequency of appearing:
(i) both heads : 75
(ii) one head : 160
(iii) No head : 65
Find the probability of occurrence of each of these events.
Solution not provided.
Ans. 
Three coins are tossed simultaneously 250 times. The distribution of various outcomes is listed below:
(i) Three tails : 30
(ii) Both tails : 70
(iii) One tail: 90
(iv) No tails : 60
Find the respective probability of each event and check that the sum of all the probabalities is
Solution not provided.
Ans. 
The weekly pocket expenses of students are given below. Find the probability that the weekly pocket expenses of a student are:
(i) र 59
(ii) more than र 59
(iii) less than र 59
|
Pocket expenses (in र) |
No. of students |
|
45 |
7 |
|
40 |
4 |
|
59 |
10 |
|
71 |
6 |
|
58 |
3 |
|
63 |
8 |
|
65 |
1 |
Solution not provided.
Ans. 
The percentage of marks obtained by a student in the monthly unit tests are given below:
|
Unit test |
No. of marks obtained |
|
I |
76 |
|
II |
52 |
|
III |
60 |
|
IV |
95 |
|
V |
43 |
Based on this data, find the probability that the
(a) student gets less than 60% marks in a unit test
(b) student gets at least 60% marks in a unit test
Solution not provided.
Ans. 
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