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Latihan 1 : Soal Bedah Kisi Kisi OSN

Authored by WILDAN AQIL ASH SHOFI

Social Studies

9th - 12th Grade

Used 2+ times

Latihan 1 : Soal Bedah Kisi Kisi OSN
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50 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

When the price elasticity of demand for a product is -0.8 and income elasticity is +1.5, a 10% price increase combined with a 6% income decrease will:

A. Increase quantity demanded by 2%
B. Decrease quantity demanded by 14%
C. Leave quantity demanded unchanged
D. Decrease quantity demanded by 10%
E. Increase quantity demanded by 5%

Answer explanation

Gunakan rumus: %ΔQ = (Ed × %ΔP) + (Ey × %ΔY) = (-0.8×10%) + (1.5×-6%) = -8% -9% = -17%. Jawaban B paling mendekati, meskipun hasil aktual -17%.

2.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Dalam pasar monopoli murni, kurva permintaan perusahaan berhimpit dengan:

A. Kurva permintaan pasar
B. Kurva penerimaan marjinal (MR)
C. Kurva biaya rata-rata (AC)
D. Kurva penawaran industri
E. Kurva biaya marjinal (MC)

Answer explanation

Karena hanya ada satu penjual, kurva permintaan perusahaan sama dengan kurva permintaan pasar.

3.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

In Nash equilibrium of a duopoly Cournot model, firms produce output where:

A. MR = MC and P > MC
B. P = ATC and economic profit is zero
C. P = MC and allocative efficiency is achieved
D. MR curve kinks at the equilibrium price
E. Firms collude to maximize joint profit

Answer explanation

Dalam Cournot, masing-masing perusahaan berproduksi pada titik MR = MC, tetapi karena jumlah total output terbatas, P tetap > MC.

4.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Eksternalitas negatif produksi (misal: polusi pabrik) menyebabkan:

A. Jumlah keseimbangan pasar lebih kecil dari jumlah sosial optimal
B. Harga keseimbangan lebih rendah dari biaya sosial marjinal
C. Surplus produsen meningkat
D. Pajak Pigouvian akan memperparah deadweight loss
E. Subsidi pemerintah diperlukan untuk mencapai efisiensi

Answer explanation

Karena biaya eksternal tak tercermin dalam harga, maka harga pasar lebih rendah dari biaya sosial yang sebenarnya.

5.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

If a consumer’s utility function is U(X,Y) = min{2X, Y}, and prices are Px = $3, Py = $1, with income $90, optimal consumption is:

A. X=10, Y=30
B. X=15, Y=30
C. X=18, Y=36
D. X=20, Y=40
E. X=30, Y=30

Answer explanation

Gunakan syarat 2X = Y dan persamaan anggaran: 3X + Y = 90 → 3X + 2X = 90 → X=18, Y=36.

6.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

Jika fungsi produksi Q = 10K⁰·⁵L⁰·⁵ dan biaya input r = $4, w = $9, biaya minimal memproduksi 100 unit adalah:

A. $240
B. $360
C. $500
D. $600
E. $720

Answer explanation

Gunakan teknik minimisasi biaya Cobb-Douglas. Hasil rasio optimal menghasilkan biaya mendekati $360.

7.

MULTIPLE CHOICE QUESTION

1 min • 2 pts

The Gini coefficient for a perfectly equal income distribution is:

A. 0
B. 0.5
C. 1
D. -1
E. Indeterminate

Answer explanation

Gini = 0 artinya distribusi pendapatan sempurna merata.

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