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

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Class 10 SEE Compulsory Mathematics Question Paper 2082 (SEE) – Solved

NEB

2082

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 समुदायमा रहेका 80 जना युवाहरूको समूहमा गरिएको सर्वेक्षणमा आइफोन र एन्ड्रोइड फोन मन पराउने युवाहरूको अनुपात 3:2 पाइयो । तीमध्ये 10 जनाले दुवै प्रकारको र 10 जनाले अन्य प्रकारको फोन मन पराएको पाइयो ।

In a survey among 80 youths of a community, it is found that the ratio of the number of youths who liked iPhone and Android phone was 3:2. Among them 10 liked both types and 10 liked other types of phone.

(a) यदि I र A ले क्रमशः आइफोन र एन्ड्रोइड फोन मन पराउने युवाहरूको समूह जनाएको भए \(n(I \cap A)\) को मान लेख्नुहोस् ।

If I and A denote the sets of youths who liked iPhone and Android Phone respectively, write the value of \(n(I \cap A)\).

(b) माथिको जानकारीलाई भेन चित्रमा प्रस्तुत गर्नुहोस् ।

Show the above information in a Venn-diagram.

(c) आइफोन मात्र मन पराउने युवाहरूको सङ्ख्या पत्ता लगाउनुहोस् ।

Find the number of youths who liked iPhone only.

(d) आइफोन मात्रै मन पराउने युवाहरूको सङ्ख्या एन्ड्रोइड फोन मात्रै मन पराउने सङ्ख्याभन्दा कति प्रतिशत कम वा बढी रहेछन् ? तुलना गर्नुहोस् ।

By what percentage more or less is the number of youths who liked iPhone only than the number of youths who liked only Android Phone? Compare it.

[1 + 1 + 3 + 1]
2.

एक जना कृपकले कुखुरा पालनका लागि कृषि विकास बैङ्कबाट रु.5,00,000 ऋण लिएछन् । वार्षिक 8% का व्याजदरले उसले 2 वर्षमा ऋण चुक्ता गर्ने लक्ष्य लिएछ । बैङ्कले अर्धवार्षिक रूपमा चक्रीय व्याज हिसाब गर्दछ ।

A farmer has taken Rs.5,00,000 loan from Agriculture development bank for his poltry farm. He aimed to pay back the loan in 2 years at the rate of 8% per annum. Bank calculated the interest compounded semiannually.

(a) 2 वर्षमा अर्धवार्षिक रूपमा कति पटक ब्याज गणना गरिन्छ, लेख्नुहोस् ।

How many times the compound interest semiannually is calculated in 2 years? Write it.

(b) उक्त किसानले पहिलो वर्षको अन्त्यमा केही साँवा र ब्याज गरी जम्मा रु.3,00,000 ऋण तिरेछ र बाँकी अर्को वर्षमा चुक्ता गर्दा उसले कति रकम तिर्लाँ ? पत्ता लगाउनुहोस् ।

The farmer paid Rs.3,00,000 at the end of first year with some principal and interest. How much does he need to clear the dept in next year? Find it.

(c) यदि कृपकले 2 वर्षको अन्त्यमा एकमुष्ट ऋण तिरेको भए पहिलेको भन्दा कति कम वा बढी ब्याज तिर्नु पथ्यो ? पत्ता लगाउनुहोस् ।

If the farmer had paid the loan at the end of two years, how much less or more interest should he have to pay than before? Find it.

[1 + 2 + 2]
4.

नेपाल राष्ट्र बैङ्कले निर्धारण गरेको विनिमयदरअनुसार कुनै दिन 1 अष्ट्रेलियन डलरको खरिददार र बिक्रीदर क्रमशः ने.रु.93.20, ने.रु.93.59 रहेको थियो ।

According to Nepal Rastra Bank's exchange rate, the buying and selling rate of 1 Australian dollar were NRs.93.20 and NRs.93.59 respectively in a certain day.

(a) अष्ट्रेलियन डलर 5,000 मा कति नेपाली रुपैयाँ साट्न सकिन्छ ? पत्ता लगाउनुहोस् ।

How much Nepali currency can be exchanged with Australian dollars 5,000? Find it.

(b) यदि नेपाली मुद्रा 1.5% ले अवमूल्यन भए नयाँ विनिमय दर कति होला ? पत्ता लगाउनुहोस् ।

If the Nepalese currency is devaluated by 1.5%, what will be the new exchange rate? Find it.

(c) अवमूल्यनपछि अष्ट्रेलियन डलर 5000 लाई नेपाली रुपैयाँमा साट्दा कति फाइदा वा घाटा हुन्छ होला ? पत्ता लगाउनुहोस् ।

How much profit or loss will be there by exchanging Australian dollars 5000 into Nepalese rupees after devaluation? Find it.

[1 + 1 + 1]
12.

दिइएको चित्रमा O वृत्तको केन्द्रबिन्दु हो । जहाँ \(\angle WXY = x^\circ\) र \(\angle WZY = 3x^\circ\) दिइएको छन् ।

In the given figure, O is the centre of the circle. Where \(\angle WXY = x^\circ\) and \(\angle WZY = 3x^\circ\) are given.

[Figure: Circle with centre O and cyclic quadrilateral WXYZ; angle WXY = x degrees, angle WZY = 3x degrees]

(a) चक्रीय चतुर्भुजको सम्मुख कोणहरूको योगफल कति हुन्छ ? लेख्नुहोस् ।

What is the sum of the opposite angles of a cyclic quadrilateral? Write it.

(b) दिइएको चित्रबाट x को मान पत्ता लगाउनुहोस् ।

Find the value of x from the given figure.

(c) केन्द्रीय कोण WOY को आधा परिधी कोण WXY हुन्छ भनी प्रयोगात्मक रूपमा परीक्षण गर्नुहोस् । (कम्तीमा 3 से.मी. अर्धव्यास भएका दुईओटा वृत्तहरू आवश्यक छन् ।)

Verify experimentally that the circumference angle WXY is half of the central angle WOY. (Two circles having at least 3 cm radii are necessary.)

(d) प्रमाणित गर्नुहोस् । \(\angle OWZ + \angle OYZ = 135^\circ\)

Prove that: \(\angle OWZ + \angle OYZ = 135^\circ\)

[1 + 1 + 2 + 2]
14.

संगैको चित्रमा 45 मिटर अग्लो भ्युटावरको (AB) टुप्पाबाट पूर्वपट्टि 15 मिटर पर रहेको एउटा (CD) घरको छतमा हेर्दा 60° को कोण बनेको छ ।

In the figure along side, from the top of the 45 meter high view tower (AB) an angle of 60° is formed when looking at the roof of a house at a distance of 15 meter to the east of the tower.

[Figure: View tower AB=45m, house CD to the east at distance BD=15m, angle of depression 60 degrees from A to roof C]

(a) घरको छतदेखि भ्युटावरको टुप्पामा हेर्दा कति डिग्रीको कोण बन्छ ? लेख्नुहोस् ।

What is the angle formed when observed from the roof of the house to the top of the view tower? Write it.

(b) टावरमा AE भागको उचाइ कति हुन्छ ? पत्ता लगाउनुहोस् ।

What is the height of the part AE of the tower? Find it.

(c) घरको उचाइ कति हुन्छ ? पत्ता लगाउनुहोस् ।

What is the height of the house? Find it.

(d) अवलोकनकर्ताले सो भ्युटावरको टुप्पाबाट कति तल भरेर उक्त घरको छतमा हेर्दा अवनति कोण 45° हुन्छ ? पत्ता लगाउनुहोस् ।

What distance does the observer have to come down from the top of the view tower to observe the roof of the house such that the angle of depression is 45°? Find it.

[1 + 1 + 1 + 1]
16.

एउटा बाकसमा 5 ओटा हरियो र 7 ओटा निला उस्तै र उस्तै बलहरू छन् । उक्त बाकसबाट दुईओटा बलहरू एकपछि अर्को नहेरीकन पुनः राखेर फिटिएका छन् ।

A box contains 5 green and 7 blue balls of same shape and size. Two balls are drawn randomly one after another with replacement from the box.

(a) यदि A र B दुई ओटा अनाश्रित घटनाहरू भएमा सम्भाव्यताको गुणनको सिद्धान्तको सूत्र लेख्नुहोस् ।

If A and B are two independent events, write the formula of the multiplication law of probability.

(b) सबै सम्भावित परिणामहरूको सम्भाव्यतालाई वृक्ष चित्रमा देखाउनुहोस् ।

Show the probability of all the possible outcomes in a tree diagram.

(c) दुवै निला बलहरू प्राप्त गर्ने सम्भाव्यता पत्ता लगाउनुहोस् ।

Find the probability of getting both blue balls.

(d) एउटै रङका बलहरू र फरक रङका बलहरू पर्ने सम्भाव्यताको अनुपात पत्ता लगाउनुहोस् ।

Find the ratio of the probability of getting balls of the same colour to the different colour.

[1 + 2 + 1 + 1]