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Class 10 Compulsory Mathematicsकक्षा १० अनिवार्य गणित — SEE notes & solutions

class 10see

Class 10 SEE Compulsory Mathematics Question Paper 2081 (SEE) – Solved

NEB

2081

Class 10 (SEE)

Compulsory Mathematics

Full Marks: 75

Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

"Section A"

दिइएका निर्देशनका आधारमा आफ्नै शैलीमा सिर्जनात्मक उत्तर दिनुहोस् : सबै प्रश्नहरू अनिवार्य छन् । (Answer all the questions.)

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1.

एउटा विद्यालयको कक्षा दशका 100 जना विद्यार्थीमध्ये 60 जनाले अङ्ग्रेजी र 50 जनाले गणित मन पराएछन् । तर 20 जनाले यी दुईमध्ये कुनै पनि विषय मन पराएनन् । अङ्ग्रेजी मन पराउने र गणित मन पराउने विद्यार्थीहरूको समूहलाई क्रमशः 'E' र 'M' ले जनाइएका छन् ।

Out of 100 students of class ten of a school, 60 liked English and 50 like mathematics. But 20 did not like any of these two subjects. The sets of students who liked English and Mathematics are denoted by 'E' and 'M' respectively.

(a) दुईमध्ये कुनै पनि विषय मन नपराउने विद्यार्थीहरूको समूहलाई गणनात्मकता सङ्केतमा लेख्नुहोस् ।

Write the set of the students who did not like any of these two subjects in the cardinality notation.

(b) दुवै विषय मन पराउने विद्यार्थी सङ्ख्यालाई \(x\) मानी दिइएको जानकारीलाई भेन चित्रमा प्रस्तुत गर्नुहोस् ।

Present the given information in a Ven-diagram assuming \(x\) for the number of students who liked both subjects.

(c) एउटा मात्र विषय मन पराउने विद्यार्थीहरूको सङ्ख्या पत्ता लगाउनुहोस् ।

Find the number of students who liked exactly one subject.

(d) यदि दुईमध्ये कुनै पनि विषय मन नपराउने विद्यार्थीको सङ्ख्या 30 भएको अवस्थामा दुवै विषय पन पराउने विद्यार्थी सङ्ख्यामा के असर पर्छ ? पत्ता लगाउनुहोस् ।

If 30 students did not like any of these two subjects, what will be the effect in the number of students who liked both subjects? Find it.

[1 + 1 + 3 + 1]
13.

चित्रमा, वृत्तको केन्द्रविन्दु O र ABDC एउटा चक्रीय चतुर्भुज हो ।

In the figure, O is the center of the circle and ABDC is a cyclic quadrilateral.

[Figure: Circle with center O and cyclic quadrilateral ABDC inscribed, points B and D on circle]

(a) वृत्तको एउटै चापमा उभिएका परिधि कोणहरू विचको सम्बन्ध के हुन्छ ? लेख्नुहोस् ।

What is the relation between inscribed angles standing on same arc of a circle? Write it.

(b) यदि परिधिकोण \(BAC = 35^\circ\) छ भने \(\angle BOC\) को मान पत्ता लगाउनुहोस् ।

If inscribed angle \(BAC = 35^\circ\), find the value of \(\angle BOC\).

(c) यदि चाप BDC र चाप ACD बराबर छन् भने प्रमाणित गर्नुहोस् : \(AB \parallel CD\).

If arc BDC and arc ACD are equal, prove that: \(AB \parallel CD\)

(d) \(\angle BAC\) र \(\angle BDC\) कोणहरू परिपूरक हुन्छन् भनी प्रयोगद्वारा सिद्ध गर्नुहोस् ।

(कम्तीमा 3 से.मि. अर्धव्यास भएका दुई वृत्तहरू आवश्यक छन् ।)

Verify experimentally that \(\angle BAC\) and \(\angle BDC\) are supplementary.

(Two circles having at least 3 cm radii are necessary.)

[1 + 1 + 2 + 2]
14.

हिमालीको उचाइ 1.22 मि. छ । उनले कोण नाप्ने यन्त्रको सहयोगमा विद्यालय भवनभन्दा 36 मि. परबाट विद्यालय भवनको टुप्पो अवलोकन गर्दा \(30^\circ\) को कोण पाइन् ।

The height of Himali is 1.22 m. She observed the top of the school building standing 36 m far from the base of school building found the angle of \(30^\circ\).

(a) दिइएको सन्दर्भ अनुसार हिमालीले विद्यालय भवनको टुप्पोमा हेर्दा बनेको कोणलाई के भनिन्छ ? लेख्नुहोस् ।

What is the name of the angle found when Himali observed at the top of school building according to the given context? Write it.

(b) माथिको सन्दर्भ अनुसारको चित्र बनाउनुहोस् ।

Sketch the figure from the above context.

(c) विद्यालय भवनको उचाइ निकाल्नुहोस् ।

Find the height of the school building.

(d) विद्यालय भवनको टुप्पो हेर्दा \(60^\circ\) को कोण बनाउन हिमाली उक्त स्थानबाट कति मिटर नजिक वा टाढा हिड्नु पर्छ ? कारण दिनुहोस् ।

How many meter should Himali have to walk nearer or farther from that place to make the angle of the top of the building to be \(60^\circ\)? Give reason.

[1 + 1 + 1 + 1]
16.

राम्ररी फिटिएको 52 पत्ति तासको प्याकवाट नहेरीकन एकपछि अर्को (पुन नराखी) दुईवटा तास फिकिएका छन् ।

From a well shuffled pack of 52 cards two cards are drawn randomly one after another without replacement.

(a) सम्भाव्यताको गुणन सिद्धान्त लेख्नुहोस् ।

Write the multiplicative law of probability.

(b) अनुहार भएको तास पर्ने र नपर्ने सबै सम्भावित परीणामहरूको सम्भाव्यतालाई वृक्षचित्रमा देखाउनुहोस् ।

Show the probability of all possible outcomes of getting and not getting face cards in a tree diagram.

(c) दुवै तास अनुहार भएको पर्ने सम्भाव्यता निकाल्नुहोस् ।

Calculate the probability of getting both face cards.

(d) दुवै तास अनुहार भएको पर्ने सम्भाव्यता र दुवै तास अनुहार नभएको तास पर्ने सम्भाव्यताविच तुलना गर्नुहोस् ।

Compare between the probability of getting both face cards and the probability of not getting both face cards.

[1 + 2 + 1 + 1]