CTET 2 Math and Science 17 Jan 2022 Paper

Question : 59 of 150

Marks: +1, -0

Which of the following is NOT an example of proportionality?

4 candies cost Rs. 5, and so 10 candies cost Rs. 12.50
Ravi's mother's age is two times that of Ravi's age at present, so when Ravi will be 30 years old, his mother will be 60 years old.
A car covers 8 km in 3 hours at a constant speed, it will cover 12 km in $4\;{1}/{2}$ hours.
The ratio of number of teachers to that of students in a school has to be 2 : 30, so for 300 students, there has to be 20 teachers.

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