If (A)=80, (B)=60, N=100, and (AB)=50, the value of (Aβ) is: MCQ with Answer and Explanation

If (A)=80, (B)=60, N=100, and (AB)=50, the value of (Aβ) is:
A. 20
B. 10
C. 40
D. 30
Answer: Option D
Solution (By JKSSB Mock Tests)
(Aβ) = (A) - (AB) = 80 - 50 = 30.

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Which of the following is true about WPI and CPI in India?
A. Both cover goods and services.
B. Both cover only goods.
C. CPI covers only goods, WPI covers goods and services.
D. WPI covers only goods, CPI covers goods and services.

Correct Answer: Option D


Explanation:
WPI is limited to goods; CPI includes both goods and services.

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Primary data is collected:
A. From published sources
B. By the investigator for the first time for a specific purpose
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D. From government reports

Correct Answer: Option B


Explanation:
Primary data is original data gathered directly by the researcher for the current study.

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Assertion (A): Primary data collection is generally more time-consuming than secondary data collection. Reason (R): Primary data requires designing instruments, sampling, and fieldwork, whereas secondary data is readily available.
A. A is false but R is true
B. Both A and R are true, but R is not the correct explanation of A
C. Both A and R are true, and R is the correct explanation of A
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