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(Single Attempt)

Question


A car showroom has 3 types of cars.

They are Mercedes, Bentley and Rolls Royce.

For every 4 Mercedes, there are 5 Bentley cars.

For every 4 Bentley cars, there are 5 Rolls Royce cars.

(a) What is the ratio of the number of Mercedes cars to Bentley cars to Rolls Royce cars ?

(b) The showroom sold 21 Rolls Royce cars and as a result, the percentage of Rolls Royce cars became 33`1/3`% of the total number of cars in the showroom.

How many cars were there in the showroom at first?

(c) How many of these were Bentley cars?

 

 


Notes to students:

  1. If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12
  2. If your answer is a ratio, leave it as a:b

 

 

The correct answer is : 16:20:25,183,60
(a)__,(b)___,(c)___