Study HubHubPage 12/62Scan verified MCQs with the answer highlighted, then open explanations when you want the reasoning.
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Probability (either)
A ball is drawn at random from a box containing 70 white and 30 red balls. What is the probability that the ball is either white or red?
Since the box contains only white and red balls, the probability of drawing either a white or red ball is the total probability, which is 1.
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Sum of odd integers
The sum of the first seventy positive odd integers is:
The sum of the first n positive odd integers is n squared. For 70 odd integers, the sum is 70² = 4900. Since 4900 is option C, it is the correct answer, but the question's correct_answer was incorrectly set to C. The answer is indeed 4900, so correct_answer should be C, not D.
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Bengal partition
When was Bengal partitioned?
The first partition of Bengal occurred in 1905 under British rule, dividing the province for administrative purposes. This event is historically significant and widely recognized as occurring in 1905.
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Sea water salinity
The salinity of seawater is determined by the amount of common salt (sodium chloride) in 1 kilogram of seawater. Approximately how much common salt does 1 kilogram of seawater contain?
The salinity of seawater is commonly expressed as the amount of dissolved salts in grams per kilogram of seawater. On average, seawater contains about 35 grams of dissolved salts per kilogram, not 1 gram. Sodium chloride (common salt) makes up about 85% of these dissolved salts, so roughly 30 grams of sodium chloride are present per kilogram of seawater. Therefore, the correct amount of common salt in 1 kilogram of seawater is approximately 30 grams, which is not among the options A (1 gram), B (10 grams), or C (1 kg). Hence, the correct answer is D (None of these).
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Big Bang Theory timeline
According to the Big Bang Theory, the Universe began about how many billion years ago?
According to the Big Bang Theory, the Universe began about 13.8 billion years ago, which does not fall within any of the ranges provided in options A, B, or C. Therefore, the correct answer is 'None of these'.
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SAARC membership
Which of the following countries is not a member of SAARC?
Myanmar is not a member of SAARC. The member countries are Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka. Therefore, Myanmar is correctly identified as not a member.
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Work done
The work done by a force in moving an object from point P(1,1,1) to point Q(1,2,2) is:
The displacement vector from P(1,1,1) to Q(1,2,2) is (0,1,1). The work done is the dot product of force F = (1,1,1) and displacement vector (0,1,1), which equals 1*0 + 1*1 + 1*1 = 2.
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Indemnity provision (FIA Act)
Indemnity provision of the FIA Act is given in:
The indemnity provision under the FIA Act is specifically given in Section 8-A, which provides protection to officers and employees of the FIA from legal proceedings for acts done in good faith during their official duties.
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Vocabulary (divulge)
I cannot ------------- further information about the case, the investigation officer said to the reporters, or it will jeopardize the investigation.
The word 'divulge' means to reveal or disclose information, which fits the context of not revealing further information to avoid jeopardizing the investigation. The other options do not fit as precisely in this context.
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Contractions and Proper Nouns
---------- going to be chilly weather tomorrow as confirmed in the ------------- Department's report.
The correct sentence is "It's going to be chilly weather tomorrow as confirmed in the Met Department's report." "It's" is the contraction of "It is," which fits the sentence context. Also, "Met" is short for "Meteorological," so it should be capitalized as part of the proper noun "Met Department." Option B incorrectly uses "Its" which is a possessive pronoun and does not fit here.