There are 300 passengers on a plane, 7/20 of them are men, 30% are women, the rest are children. Work out the number of children.
300 x (7/20) = 300/20 x 7 = 15 x 7 = 105 = number of men on the plane.
300 x 0.3 = 90 (Or 300/10 x 3) = number of women on the plane.
105 + 90 = number of adults on the plane = 195.
300 - 195 = 105 = number of children on the plane.
HT
Related Maths GCSE answers
All answers ▸A)Write x^2 – 8x + 25 in the form (x – a)^ 2 + b. (B) Write down the coordinates of the turning point of the graph of y = x2 – 8x + 25. (C)Hence describe the single transformation which maps the graph of y = x2 onto the graph of y = x2 – 8x + 25.
GCSE Maths - Solve the equation (2x+3)/(x-4) - (2x-8)/(2x+1) = 1 Give your answer to 2 decimal places.
How do I factorise a quadratic equation?
A car depreciates at 8% per year. The initial price of the car is £25,000. How much will the car be worth after 4 years? After how many years will the car be worth less than £14,000?