NDA 2020
- Exam
- NDA
- Year
- 2020
- Subject
- Mathematics
- Chapter
- Statistics
NDA 2020 · Mathematics · Statistics
Paragraph: Read the following information and answer: Consider the...
Paragraph:
Read the following information and answer:
Consider the following statements :
1. Modal value of the marks in Physics lies in the interval .
2. Median of the marks in Physics is less than that of marks in Mathematics.
Which of the above statements is/are correct?
Options
- A1 only
- B2 only
- CBoth 1 and 2
- DNeither 1 nor 2
Correct answer
A. 1 only
Step-by-step solution
(1) Modal value of the marks of Physics is the interval in which maximum number of students got his marks. In the marks interval of ( , number of students in Physics is 30 , which is largest number of students in any interval. Hence, modal values of marks in Physics is (30-40). Statement (1) is correct.
(2) Median class is given by item i.e. \left(\frac{100}{2}\right)^{\text{th }}(40-50)(30-40)$\begin{aligned} & =40+\frac{50-49}{26} \times 10=40.385 \\ & \text{Median for Maths }=30+\frac{\frac{100}{2}-31}{38} \times 10 \\ & =30+\frac{50-31}{38} \times 10=35\end{aligned}
Thus, median of the marks in Physics is more than median of the marks in Mathematics.
Hence, statement (2) is not correct.