In a class, 60% students pass in English and 70% in Mathematics. 20% fail in both. The percentage that pass in at least one subject is: MCQ with Answer and Explanation

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In a class, 60% students pass in English and 70% in Mathematics. 20% fail in both. The percentage that pass in at least one subject is:

A. 50%

B. 60%

C. 80%

D. 90%

Answer: Option C

Solution (By JKExamLibrary)

Pass in at least one = 100% - fail in both = 100% - 20% = 80%.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1 Report Error

If P(A|B) > P(A), then:

A. B positively influences the probability of A

B. A and B are mutually exclusive

C. A and B are independent

D. B has a negative influence on A

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Correct Answer: Option A

Explanation:
Conditional probability greater than unconditional indicates a positive association.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

If the base year WPI is 100 and the current year WPI is 120, the inflation rate is:

A. 80%

B. 20%

C. 16.67%

D. 120%

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Correct Answer: Option B

Explanation:
Inflation rate = (120-100)/100 × 100% = 20%.

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Question #3 Report Error

If the mean of a set of 10 observations is 20, and 5 is added to each observation, what will be the new mean?

A. 100

B. 15

C. 25

D. 20

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Correct Answer: Option C

Explanation:
The arithmetic mean is affected by the change of origin. If a constant is added to all observations, the mean increases by that constant.

This question belongs to: Accountancy and Statistics Statistics

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