Practice eju-math-course-1 questions with answers and explanations.
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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(6,3) = 20.
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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(11,2) = 55.
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Probability = favourable outcomes ÷ total outcomes.
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Mean = (12 + 8 + 1 + 20)/4 = 10.25.
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f(7)=2×7+9=23.
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10% of 30 = 3.
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Area = 7 × 9 = 63 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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Area = 17 × 7 = 119 cm².
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10% of 42 = 4.2.
