Practice japan-common-test-math-ia questions with answers and explanations.
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10% of 30 = 3.
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Area = 6 × 18 = 108 cm².
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By Vieta’s formula, the sum of the roots is the coefficient of x with sign changed.
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Use combinations: C(7,3) = 35.
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Probability = favourable outcomes ÷ total outcomes.
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Mean = (18 + 19 + 8 + 37)/4 = 20.50.
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f(7)=6×7+4=46.
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10% of 38 = 3.8.
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Area = 13 × 20 = 260 cm².
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Mean = (11 + 17 + 7 + 28)/4 = 15.75.
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f(7)=4×7+5=33.
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Probability = favourable outcomes ÷ total outcomes.
