Practice Japan questions with answers and explanations.
Choose an option to check your answer.
Use combinations: C(6,3) = 20.
Choose an option to check your answer.
Probability = favourable outcomes ÷ total outcomes.
Choose an option to check your answer.
Mean = (9 + 12 + 3 + 21)/4 = 11.25.
Choose an option to check your answer.
f(7)=6×7+7=49.
Choose an option to check your answer.
Use combinations: C(12,4) = 495.
Choose an option to check your answer.
Probability = favourable outcomes ÷ total outcomes.
Choose an option to check your answer.
Mean = (2 + 10 + 2 + 12)/4 = 6.50.
Choose an option to check your answer.
f(7)=4×7+8=36.
Choose an option to check your answer.
Area = 17 × 7 = 119 cm².
Choose an option to check your answer.
By Vieta’s formula, the sum of the roots is the coefficient of x with sign changed.
Choose an option to check your answer.
Use combinations: C(11,2) = 55.
Choose an option to check your answer.
Probability = favourable outcomes ÷ total outcomes.
