गणित – Mathematics MCQ
गणित – डिप्लोमा प्रवेश
Mathematics · CTEVT Diploma Engineering Entrance · ७५१ प्रश्न
७५१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
गणित: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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A bag contains 5 red and 3 blue balls. One ball is drawn at random. The probability that it is blue is:
सही उत्तर: घ) 3/8
Total balls = 8, blue = 3, so P = 3/8. 3/5 wrongly compares blue with red instead of with the total.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A card is drawn at random from a well-shuffled pack of 52 cards. The probability that it is a king is:
सही उत्तर: क) 1/13
There are 4 kings, so P = 4/52 = 1/13. 1/4 is the probability of a particular suit.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two fair coins are tossed together. The probability of getting at least one head is:
सही उत्तर: क) 3/4
Outcomes: HH, HT, TH, TT; three have at least one head, so P = 3/4. Equivalently 1 − P(TT) = 1 − 1/4.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A fair die is thrown once. The probability of getting a prime number is:
सही उत्तर: ख) 1/2
Primes on a die are 2, 3 and 5, so P = 3/6 = 1/2. 1 is not a prime number, a common slip that gives 2/3.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The range of the data 12, 5, 20, 8, 15 is:
सही उत्तर: ग) 15
Range = highest − lowest = 20 − 5 = 15. 20 is only the largest value.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a class, 30 students have a mean score of 60 and another 20 students have a mean score of 70. The combined mean of all 50 students is:
सही उत्तर: घ) 64
Combined mean = (30 × 60 + 20 × 70)/50 = 3200/50 = 64. 65 is the simple average of 60 and 70, which ignores the different group sizes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The mean of 5 numbers is 20. If one number is removed, the mean of the remaining numbers becomes 18. The removed number is:
सही उत्तर: घ) 28
Total of 5 numbers = 100 and of 4 numbers = 72, so the removed number = 100 − 72 = 28. The 2 is merely the difference in means.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The mode of the data 2, 3, 5, 3, 7, 3, 5 is:
सही उत्तर: क) 3
3 occurs three times, more than any other value, so the mode is 3. 5 occurs only twice.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The median of 3, 9, 5, 7, 11, 13 is:
सही उत्तर: ख) 8
Arranged: 3, 5, 7, 9, 11, 13; with 6 values the median is the average of the 3rd and 4th, (7 + 9)/2 = 8. Arrange data in order first; taking middle values of the unsorted list is a common error.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The mean of 4, 8, 6, 10 and 12 is:
सही उत्तर: ग) 8
Mean = (4 + 8 + 6 + 10 + 12)/5 = 40/5 = 8. Here the mean equals the median, since the data are evenly spread.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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