NDA || Maths || Algebra_Quiz_2020 for CDS & Defence Exams

Question 1

If the ratio of AM to GM of two positive numbers a and b is 5 : 3, then a : b is equal to

Question 2

What is the principal argument of (-1 –i), where

Question 3

Direction: Consider the information given below and answer the two items that follow:

In a class, 54 students are good in Hindi only, 63 students are good in Mathematics only and 41 students are good in English only. There are 18 students who are good in both Hindi and Mathematics. 10 students are good in all three subjects.

What is the number of students who are good in either Hindi or Mathematics but not in English?

Question 4

Direction: Consider the information given below and answer the two items that follow:

In a class, 54 students are good in Hindi only, 63 students are good in Mathematics only and 41 students are good in English only. There are 18 students who are good in both Hindi and Mathematics. 10 students are good in all three subjects.

What is the number of students who are good in Hindi and Mathematics but not in English?

Question 5

The probabilities that a student will solve Question A and Question B are 0.4 and 0.5 respectively. What is the probability that he solves at least one of the two questions?