71. An extension worker practically explains Japanese method of paddy cultivation to a group of farmers and also show its superiority over the traditional method. In the prosess, which of the following communication methods have been used by him?
1. Method demonstration
2. Result demonstration
3. Field visit
4. Study tour
Correct statements are
1. Method demonstration
2. Result demonstration
3. Field visit
4. Study tour
Correct statements are
72. Match the following columns
Column I
Column II
a. 5C2 is equal to
1. 60
b. 5P3 is equal to
2. one
c. Probability ranges from
3. 0 to 1
d. P × q would always be
4. 10
| Column I | Column II |
| a. 5C2 is equal to | 1. 60 |
| b. 5P3 is equal to | 2. one |
| c. Probability ranges from | 3. 0 to 1 |
| d. P × q would always be | 4. 10 |
73. The expectation of X is defined as
74. The word 'statistics' is originated from which word?
75. If mode is 10 and arithmetic mean is 13, then median will be
76. Puppet show in villages as a method for transfer of technology is an example of
77. If two factors are involved in experimentation and both the factors requires long plot sizes, the design suited for this will be
78. The greater value of r is
79. Variance of twenty observations is 8, if every observation is multiplied by 2, what is the value of variance now?
80. Mitra Kisan is an employee of
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