Solution:
Let the seats be: Maths = 2k Physics = 3k Biology = 4k
Increase each by 50% means multiply each by 1.5:
Maths new = 2k × 1.5 = 3k Physics new = 3k × 1.5 = 4.5k Biology new = 4k × 1.5 = 6k
New ratio = 3k : 4.5k : 6k
Divide each by 1.5k:
3k / 1.5k = 2 4.5k / 1.5k = 3 6k / 1.5k = 4
So, the new ratio =
2 : 3 : 4, same as original.
Answer: (b) 2:3:4
The following ternary figure shows the marks obtained by students A, B and C in an exam of 100 marks. Here, C received 10 marks in Physics, 50 marks in Chemistry and 40 marks in Mathematics.
Which one of the following is CORRECT?
With a certain set of diameters, a tractor’s front wheels make 2 revolutions for every 1 revolution of the rear wheels. The effect of changing wheel diameter(s) is shown in the given plot.
In this context, which of the following statements is CORRECT?
The following bus schedule is seen at a bus stop located somewhere between town A and town B.
Town A: 00:10, then every 20 minutes
Town B: 00:15, then every 20 minutes
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The correct PIN is
