Q1 of 2 Page 311

In an exam, 14% of students failed and 559 students passed. Determine the number of students who failed.

Let the total number of students = x


Number of students who passed the examination = 559


Failed students = x – 559……(1)



So failed students = 0.14x……(2)


So equation (1) and (2) both are same


x – 559 = 0.14 x


x – 0.14 x = 559


0.86 x = 559



X = 650


Number of students who failed = x – 559 = 91


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2

A number is selected at random from the set {2, 3, 4, 10}. Which event by definition covers the entire sample space of this experiment?

1. The number is greater than 2.


2. The number is not divisible by 5.


3. The number is even or less than 12.


4. The number is neither prime nor composite.


5. The square root of the number is less than 3.