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

Question

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. 90%

B. 50%

C. 80%

D. 60%

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The probability of drawing a Spade from a well-shuffled deck of 52 cards is:

A. 1/13

B. 1/2

C. 13/52

D. 1/4

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Correct Answer: Option D

Explanation:
There are 13 spades in a 52-card deck. Probability = 13/52 = 1/4.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The sample space for tossing three coins is:

A. 4 outcomes

B. 2 outcomes

C. 6 outcomes

D. 8 outcomes

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Correct Answer: Option D

Explanation:
Three independent coins yield 2³ = 8 possible sequences.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The empirical relationship between mean, median, and mode for a moderately skewed distribution is:

A. Mode = 2Median - Mean

B. Mean = (Mode + Median)/2

C. Median = (Mean + Mode)/2

D. Mean - Mode = 3(Mean - Median)

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Correct Answer: Option D

Explanation:
The empirical formula is Mean - Mode = 3(Mean - Median) or Mode = 3Median - 2Mean.

This question belongs to: Accountancy and Statistics Statistics

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