Day 364: NDA Maths

5 questions (9 parts). Try each one first, then open its answer.

Question 1
Matrices & Determinants. Asked once: NDA 1 2023
9 $AX=B$
Tap an option to check your answer.
Question 2 (case study, 3 parts)
Probability. Asked once: NDA 1 2022
Consider the following data for the next three (03) items that follow: There are 90 applicants for a job. Some of them are graduates. Some of them have less than three years experience.
Number of graduates Number of non-graduates
At least 3 years experience 18 9
Less than 3 years experience 36 27
Let G be the event that the first applicant interviewed is a graduate and T be the event that first applicant interviewed has at least 3 years experience.
112 $P\left(G\cap\overline{T}\right)$
Tap an option to check your answer.
113 $P\left(G|\overline{T}\right)$
Tap an option to check your answer.
114 $P\left(\overline{T}|\overline{G}\right)$
Tap an option to check your answer.
Question 3
Sequence & Series. Asked once: NDA 1 2017
16 $x^2 + bx + c = 0$
Tap an option to check your answer.
Question 4
Statistics. Asked once: NDA 2 2018
114 $(x_1,y_1),(x_2,y_2),\ldots,(x_n,y_n)$
Tap an option to check your answer.
Question 5 (case study, 3 parts)
Trigonometric Identities. Asked once: NDA 1 2020
Directions for the following three (03) items: Read the following information and answer the three items that follow: Let $t_n = \sin^n\theta + \cos^n\theta$ .
34 $\frac{t_3-t_5}{t_5-t_7}$
Tap an option to check your answer.
35 $t_1^2 - t_2$
Tap an option to check your answer.
36 $t_{10}$
Tap an option to check your answer.

	Number of graduates	Number of non-graduates
At least 3 years experience	18	9
Less than 3 years experience	36	27

Question 1