Practice eju-math-course-1 questions with answers and explanations.
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Probability = favourable outcomes ÷ total outcomes.
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Use combinations: C(6,2) = 15.
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Probability = favourable outcomes ÷ total outcomes.
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Mean = (7 + 7 + 10 + 14)/4 = 9.50.
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f(7)=2×7+9=23.
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10% of 42 = 4.2.
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f(7)=6×7+10=52.
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10% of 34 = 3.4.
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Area = 12 × 6 = 72 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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Mean = (17 + 5 + 9 + 22)/4 = 13.25.
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Use combinations: C(11,4) = 330.
